Teac AP-701 - Stereo Power Amplifier Manual

Included accessories

Read this manual carefully to get the best performance from this unit.
After reading it, keep it in a safe place for future reference.
Check to be sure the box contains all the included items shown below.
Please contact the store where you purchased this unit if any of these items are missing or have been damaged during transportation.
Power cord × 1
Foot pads × 3
Owner's manual (this document, including warranty) × 1

Using the TEAC International Site

You can download updates for this unit from the TEAC International Site:
https://teac.jp/int/
Click Language at the top right of the page and select the desired country or region to access a page in the corresponding language.

Maintenance

Wipe dirt from the top cover and other panel surfaces using a soft cloth that has been slightly dampened with a diluted neutral cleanser.
Do not wipe with chemical cleaning cloths, thinner or other chemical agents. Doing so could damage the surface.
For your safety, disconnect the power cord from the outlet before cleaning.

Before use

Placement precautions

• Place the unit in a stable location near the audio system that will be used with it.
• Do not install this unit in a location that could become hot. This includes places that are exposed to direct sunlight or near a radiator, heater, stove or other heating equipment. Moreover, do not place it on top of an amplifier or other equipment that generates heat. Doing so could cause discoloration, deformation or malfunction.
  Also avoid locations that are subject to vibrations or exposed to excessive dust, cold or moisture.
• When installing this unit, leave a little space (at least 3 cm or 1") between it and walls and other devices in order to allow good heat dissipation.
  If you put it in a rack, for example, leave at least 5 cm (2") open above and 10 cm (4") open behind it. Failure to provide these gaps could cause heat to build up inside and result in fire.
• Do not place CDs, CD-Rs, cassette tapes, other audio equipment or other items that are susceptible to heat on top of the unit. Doing so could damage these items.
• Do not put cloth on top of the unit or place the unit on top of bedding or thick carpets. Doing so could cause the unit to overheat and damage it. o Do not move the unit during use.
• The voltage supplied to the unit should match the voltage printed on the back of the unit. If you are in any doubt regarding this matter, consult an electrician.
• Do not open the body of the unit as this might result in damage to the circuitry or cause electric shock. If a foreign object should get into the unit, contact your dealer.
• When removing the power plug from the wall outlet, always pull directly on the plug; never yank on the cord.

Note about pinpoint feet
High-precision metal pinpoint feet are attached to the bottom plate of this unit.
The pinpoint feet and their stands are loose, but the stands support the unit when it is placed, effectively dispersing vibrations.

• The included foot pads are intended to protect the surface where the unit is placed. Apply them to the bottoms of the footstands to avoid scratching the surface where the unit is placed.

Names and functions of parts (front)

1. STANDBY/ON switch
   Use to put the unit into standby mode or turn it on.
2. Level meters
   These show the output levels. o The level meters are illuminated when amplifier output is on.
3. Status indicator
   This shows the status of the unit.
   Lit
   Muted
   Blinking
   Amplifier protection circuit operating (amplifier output off)
4. Dimmer switch ()
   Use this to change the brightness of the level meters.
5. METER gain switch
   Use this to change level meter operation.
6. INPUT selection switch
   Use this to switch between RCA and XLR inputs.

Do not switch this when the unit is on. Failure to do so could result in sudden loud noises that could damage speakers and harm your hearing.

Names and functions of parts (back)

1. SPEAKER terminals
   Speakers that have nominal impedances between 4 Ω and 8 Ω are supported.
   Use commercially-available speaker cables to connect the speakers.
2. Analog audio input (INPUTS) connectors
   Use these to input stereo analog audio. Connect these connectors to the audio output connectors of a preamplifier or another device such as a DAC that has a preamplifier function.
   • This unit's XLR connectors are 2: HOT.
     Use commercially-available audio cables for connections.
     RCA: RCA cables
     XLR: XLR cables
     OUTPUT MODE switch
     This sets the output mode.
     STEREO: stereo power amplifier
     BI-AMP: mono bi-amplifier
     Always disconnect speakers before changing the output mode. Reconnect the speakers after changing the mode.
     Using with STEREO output mode
     Connect this unit's R input connector to the R output connector of the audio output device, and this unit's L input connector to the L output connector of the other device.
     Using with BI-AMP output mode
     Connect this unit's L connector to the L or R connector of the audio output device. The R connector of this device is not used.
3. 12V TRIGGER connectors
   Use these to control power from an external source. Do not connect anything to these connectors when not using them.
   Use commercially-available mono mini plug cables for connections.
4. SOFTWARE maintenance port
   This is used for maintenance. Do not connect anything to this port unless instructed to do so by our service department.
5. AUTO POWER SAVE switch
   This unit has an automatic power saving function.
   If the automatic power saving function is set to on, the unit will automatically enter standby mode if there is no audio input for about 30 minutes.
6. Power inlet (~IN)
   Connect the supplied power cord here.
   After all other connections are complete, connect the power cord's plug to a wall outlet.

Do not use any power cord other than the one included with this unit. Use of other power cords could result in fire or electric shock.
Unplug the cord from the outlet when not using the unit for a long time.

Connecting speakers

Notes about speaker cables

• Use commercially-available speaker cables to connect the speakers.
• Use the shortest speaker cables possible. The longer the cable, the greater the resistance value and the more that damping performance is reduced. Moreover, length also increases inductance and capacitance, degrading the sound quality of high frequencies. o Use left and right speaker cables that have the same length.

Precautions when connecting speakers

• Connect the power plugs after all connections have been made.
• Carefully read the manuals of the devices that you are connecting and follow their instructions when making connections.
• When the left and right grounds are shared in a sub woofer with a built-in amplifier, for example, use might not be possible depending on connection conditions.

ATTENTION

• This unit supports speakers that have a nominal impedance of 4 Ω – 8 Ω. If speakers with lower impedance ratings are used, the protection circuit could operate, causing sound output to stop. In some cases, their use could even cause damage to this unit or the speakers.
• This unit's red terminal is positive (¥) and its black terminal is negative (^). Generally, the ¥ wire of the speaker cable is marked to distinguish it from the ^ wire of the cable. Connect the marked wire to the red ¥ terminal and the unmarked wire to the black ^ terminal.
• If the exposed end of a core wire in a speaker cable contacts another cable or terminal, a short could occur. o Never allow speaker cables to cause a short.
• To prevent hum and noise, avoid bundling the cables together with the AC power cord or other cables.

How to connect speakers
Using bare speaker wires

1. Remove about one centimeter (1/2") of insulation from the ends of the speaker cables and twist the core wires well.
2. Turn the terminal caps counterclockwise to loosen them.
3. Insert the wires into the holes in the terminal posts and turn the terminal caps clockwise to securely connect them.
   
   • Connect them so that the wire insulation is not touching the terminal.

ATTENTION
Notice about the European model
In accordance with European safety regulations, connecting banana plugs to speaker terminals is not allowed on European models. The holes into which banana plugs could be inserted have been covered with black caps. Connect speakers using bare wires or spade connectors. If a black cap should become separated from its terminal, return it to its original position.

Connections

This unit does not have a volume adjustment function. Connect this unit to a preamplifier or another device such as a DAC that has a preamplifier function, and use that device to adjust the volume. If you connect this unit to a device that cannot be used to adjust the output volume, you will not be able to adjust the volume during playback. Sound might be output from the speakers at a very loud volume, which could harm hearing or damage equipment.
The use of this unit's two built-in amplifier channels depends on the OUTPUT MODE switch setting. Connection examples for each mode are provided below.

Complete all other connections before setting the STANDBY/ON switch to ON.

• Carefully read the manuals of the devices that you are connecting and follow their instructions when making connections.
• Do not bundle connecting cables with power cords. Doing so could cause noise.
• Connect all plugs completely.

Using STEREO output mode
Set the OUTPUT MODE switch to STEREO.

Connection example

XLR pin assignment

Using BI-AMP output mode
This unit can be used as a mono bi-amplifier.
Set the OUTPUT MODE switches on the units for the L and R channels to BI-AMP.

In BI-AMP mode, use two of these units for stereo playback.

What is bi-amp connection?
This method operates amplifiers independently for low-frequency and high-frequency speaker units.

NOTE

• Sound input through the analog audio INPUTS L connectors will be output from both the L and R SPEAKER terminals.

ATTENTION

• Bi-amplification is not possible with speakers that do not have both low frequency (LF) and high frequency (HF) connectors.
• When using bi-amp connections, remove speaker terminal links and disconnect the connections between speaker connectors and between connectors.
• Do not connect anything to the unit's analog audio INPUTS R connectors.
  Doing so could result in damage.

Connection example

Synchronizing the power supply with external devices (trigger function)
The power supply of this unit can be synchronized with a connected preamp or other device that supports trigger functions. Use commercially-available mono mini plug cables for connections.

ATTENTION
To use the trigger function, set this unit's STANDBY/ON switch to ON.

12V TRIGGER connectors
IN
Connect this to the trigger output connector of a preamp or other device.
This will make the power operation of that preamp or other device control this unit, putting it in standby and turning it on.

THRU (through output)
Signals input through the IN connector are output unchanged. By connecting this to a device that supports trigger input (e.g. a power amplifier or subwoofer), its power supply can also be synchronized with the device connected to this unit's IN connector.

Basic operation

In order to protect the speakers, turn the power for systems that this unit is connected to on and off in the following order.
NOTE
This explanation assumes that a preamplifier is connected to this unit.

Connection example

Turning the power on

1. Minimize the volume of the preamplifier.
   If using a device that cannot have its volume adjusted when it is off, minimize the volume after turning it on.
2. Turn the source device on.
3. Turn the preamplifier on.
4. Turn this unit on.
   The status indicator will light and the mute function will be activated. When the amplifier operation stabilizes, the indicator will become unlit and the mute function will be deactivated.
   
5. Start playback on the source device, and adjust the volume on the preamplifier.
   Adjust the preamplifier volume after the status indicator becomes unlit.

Do not switch this when the unit is on. Failure to do so could result in sudden loud noises that could damage speakers and harm your hearing.

Automatic power saving function
This unit has an automatic power saving function. If the automatic power saving function is set to on, the unit will automatically enter standby mode if there is no audio input for about 30 minutes.

Troubleshooting

If you experience a problem with the unit, please take a moment to review the following information before requesting service. If it still does not operate correctly, contact the retailer where you purchased the unit.

The unit does not turn on

• Check that the power cord is completely plugged into the power outlet. If the outlet is switched, confirm that the switch is in the ON position.
• Connect a different electrical device to the outlet to confirm that it is supplying power.

Noise occurs

• Place the unit as far away as possible from TVs, microwave ovens and other devices that have strong magnetism.

There is a humming noise

• If a connecting cable is near a power cord, fluorescent light or similar cause of interference, increase the distance between them as much as possible.

No sound is output

• Use the preamplifier volume knob to adjust the volume.
• Use the preamplifier to select the source that you want to hear.
• Reconfirm the connections with other equipment.
• Check the INPUT selection switch setting.

The status indicator is blinking and no sound is output.

• The and speaker cables might have shorted. Set the STANDBY/ON switch to STANDBY, and check the speaker connections.

Sound output stops suddenly and the status indicator is blinking.

• The protection circuit might have activated due to high temperature, excessive load or another cause. Set the STANDBY/ ON switch to STANDBY, check the power and speaker connections, and wait several minutes before setting it to ON again. If this unit is becoming hot, increase the amount of space between it and walls and other devices to increase the dissipation of heat.

Automatic power saving caused the unit to enter standby.

• Set the STANDBY/ON switch to STANDBY once and then set it to ON again.

Specifications

Amplifier
Maximum effective output
STEREO or BI-AMP operation. . . 260 W + 260 W
(4 Ω, 1 kHz, JEITA)
170 W + 170 W
(8 Ω, 1 kHz, JEITA) Rated output
STEREO or BI-AMP operation.. . . 230 W + 230 W
(4 Ω, 1% THD, 1 kHz)
135 W + 135 W
(8 Ω, 1% THD, 1 kHz)
Allowable speaker impedance. . . . . 4–8 Ω
Total harmonic distortion. . . . . . . 0.003% (8 Ω, 1 kHz, 55 W, JEITA)
S/N ratio. . . . . . . . . 110 dB
(8 Ω, 1 kHz, IHF-A)
Frequency response. . . 10 Hz – 50 kHz (+0 dB, −6 dB)
(8 Ω, JEITA) Input sensitivity
RCA connectors. . . . . 1.6 V
XLR connectors. .. . . . . . 1.6 V
Input impedance
RCA connectors. . .. . 32 kΩ (during STEREO operation)
16 kΩ (during BI-AMP operation)
XLR connectors. . .. . 64 kΩ (during STEREO operation)
32 kΩ (during BI-AMP operation)

External control
Trigger input (12V TRIGGER IN). . . . . . . 1
(3.5mm mono mini jack)
Input level. . . . . . . . . 12 V, 1 mA
Trigger output (12V TRIGGER THRU). .. . . . . . 1
(3.5mm mono mini jack)

General
Power supply
Model for Europe. . . . . AC 220–240 V, 50/60 Hz
Model for USA/Canada. . . . . AC 120 V, 60 Hz Power consumption
Model for Europe. . .. . . . . . . . 95 W
Model for USA/Canada. . . . . . . 97 W
External dimensions (W × H × D, including protrusions)
444 × 111.3 × 348.2 mm (17 1/2" × 4 1/2" × 13 3/4") Weight
Model for Europe. . . . . 10.1 kg (22 3/8 lb)
Model for USA/Canada. . . . . . 9.9 kg (21 7/8 lb)
Operating temperature range. . . . . . +5°C to +35°C
Operating humidity range. . . . . 5% – 85% (no condensation)
Storage temperature range. . . . −20°C to +55°C

Included accessories
Power cord × 1
Foot pads × 3
Owner's manual (this document, including warranty) × 1

• Design and specifications are subject to change without notice.
• Weight and dimensions are approximate.
• Illustrations in this manual might differ slightly from production models.