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Related Manuals for ALLNIC AUDIO L?1500
Summary of Contents for ALLNIC AUDIO L?1500
- Page 1 ALLNIC AUDIO L‐1500 LINE STAGE PREAMPLIFIER OWNER’S MANUAL ...
- Page 2 ALLNIC AUDIO L-1500 LINE STAGE PREAMPLIFIER Thank you for purchasing this Allnic Audio L‐1500 Line Stage Preamplifier. We are certain your trust in Allnic Audio and Hammertone Audio, as well as your appreciation for the sound of this high‐quality device, will be rewarded by its excellent operation for years to come. Please read this entire manual before you connect the L‐1500 Preamplifier to the other components of your system and the wall outlet.
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Page 3: Table Of Contents
TABLE OF CONTENTS: ___________________________________________________________________ INTRODUCING THE L-1500 LINE STAGE PREAMPLIFIER ___________________________________________________________________ WHAT’S IN THE BOX? ___________________________________________________________________ SAFETY ___________________________________________________________________ CLEANING Chassis Connectors ___________________________________________________________________ INITIAL SET-UP Location, Location, Location Power Connection Inputs Outputs Phase Switch Remote Control ___________________________________________________________________ INITIAL POWER ON ___________________________________________________________________ OPERATION ___________________________________________________________________... -
Page 4: Introducing The L-1500 Line Stage Preamplifier
INTRODUCING THE L‐1500 PREAMPLIFIER coupling (C‐R coupling), a “cathode follower circuit" is usually used to lower output The L‐1500 is Allnic Audio’s mid‐line preamplifier model, impedance. Unfortunately, this method of just under the top of the line L‐4000. Like all Allnic Audio lowering output impedance is accompanied by products, it uses Permalloy (Iron and nickel alloy) for its high distortion and has an "L" shaped output transformer cores. Allnic is grateful to Mr. G.W. Elmen of impedance curve. Please compare the two graphs Western Electric for inventing Permalloy for transformer below, especially for low frequency response. core use, and in so doing, providing an enormous service • to recorded music listeners everywhere. Advanced tube technology voltage regulation ‐ For The L‐1500 has the following features: quieter and more dynamic operation, the L‐1500 has an ultra high speed automatic voltage regulation • Single gain stage – A single gain stage circuit uses circuit, utilizing vacuum tubes. This also protects the only one tube for amplification (“gain”). This amplifying tubes from change in the AC line supply reproduces a purer, more detailed, more spacious and copes with any abrupt, internal current demand. and more dynamic sound than multi gain stages. • New vacuum tube damping technology – Allnic • Line output transformer coupling – The L‐1500 is Audio’s patented "Absorb GEL tube damper" “transformer coupled”. In tube amp circuitry, there technology prevents harmful vibrations from ... -
Page 5: What's In The Box
Impedance Impedance Frequency Frequency (Traditional CR Type Output Impedance Curve) (Allnic LCR Output Impedance Curve) • WHAT’S IN THE BOX? See the notes on “Location, Location, Location”. Please check that the shipping box contains the following: CLEANING • One (1) Allnic L‐1500 preamplifier – in natural Chassis and glass aluminum or black, depending on your order specification Use only a soft, lint‐free cloth dampened slightly with • One (1) power cord water only (NO cleaning fluids!) to clean the faceplate, • One (1) Owner’s Manual meter glass and chassis. Note: ... -
Page 6: Power Connection
L‐1500, or the whole unit, is not a good thing to NO PHONO STAGE ‐ The L‐1500 is a line stage do. preamplifier and does NOT have a built in phono pre‐ • amplifier section. You will need a phono pre‐amplifier if DO NOT place the unit near a strong light or heat you want to use a turntable with the L‐1500. You can source. • connect your phono pre‐amplifier to any of the five DO NOT place anything heavy on the unit. • inputs, provided you have the appropriate types of DO NOT allow rubber or vinyl materials to rest on connections or adaptors. the unit’s chassis for long periods of time. This could discolour the metal. The L‐1500 has been designed and manufactured to work most synergistically with Allnic Audio phono • DO place the unit on a shelf or stand that is stable preamplifiers, pre‐preamplifiers and equalization and not subject to vibration or sudden shock. products. • DO consider using a high quality power cord and inter‐connects, both inputs and outputs. The L‐ D. OUTPUTS 1500 is a highly sensitive piece of electronic equipment designed for neutrality and will output The L‐1500 is equipped with three pairs of outputs. Two what you put into it. (2) of the outputs require balanced connectors (XLR •... -
Page 7: Remote Control
2) Be sure you have manually turned the volume may want to switch to inverted phase sometimes. Phase control on the front panel to the extreme issues generally will result in lack of bass and/or focus of counter‐clockwise position (minimum volume). the stereo image. OPERATION REMOTE CONTROL When the Allnic L‐1500 has powered up internally and The remote control provides the ability to remotely: you have either depressed the far left hand button marked “power” on the front panel, or pressed the Power the L‐1500 on and off (it is a “toggle” type switch) power button on the remote control, the following will using the button labeled “POWER”. happen on the front panel: Select the line source input using either the numbered buttons or the up and down arrow buttons above and The light above the “power” button will illuminate. below the CHANNEL label. The meter on the far left hand of the front panel, labeled • “current” will illuminate. Any of the five numbered line Control the volume level using the up (louder) and down (quieter) arrow buttons above and below the source lights that are depressed will illuminate. After VOLUME label. about forty (40) seconds, the light above the • “operate”/”mute” button will illuminate. The L‐1500 has Mute the volume using the button labeled MUTE, a “soft start” delay for the tubes in order to extend tube located between the CHANNEL and VOLUME arrow ... -
Page 8: Tubes
THE CURRENT METER SPECIFICATIONS FOR THE ALLNIC AUDIO L‐1500 LINE STAGE PRE‐ This illuminated meter indicates the current supply to the AMPLIFIER gain tubes in the L‐1500. It is an indicator of failure or damage to the function of the unit. The needle should be Inputs: Line level × 5 pairs between the two parallel lines just left of centre on the (Balanced × 2, Unbalanced × 3) meter face. Any failure of the tubes or circuits in the L‐1500 is indicated by the meter needle moving out from between Outputs: Balanced × 1 pair these two parallel lines. You need to switch the meter and Unbalanced × 1 pair check both channels to ascertain what has occurred (Use the toggle switch located on the bottom of the chassis, Input Impedance: Unbalanced 10kΩ behind the bottom left‐hand corner of the L‐1500 front Balanced 20kΩ panel, to switch the meter between the right and left channels – toggle to the left is left channel and vice‐versa). Frequency Range: 20Hz ~ 20kHz (FLAT) 16Hz ~ 75kHz (‐3dB) If the needle has moved to the left of the parallel lines on one channel only, it means that the E810F tube for that Voltage Gain: +20dB channel is failing. If the needle has moved to the left of the parallel lines on THD (1kHz): Output 0.3V, 0.06% both channels, it means both E810F’s are failing. Output 1.0V, 0.15% ... -
Page 9: Warranty
WARRANTY All Allnic Audio amplifier products are warranted against materials and manufacturing defects for parts, excluding tubes, and labour for two (2) years from date of purchase. Tubes are warranted against materials and manufacturing defects for one (1) year from date of purchase. The warranty is transferable for the balance of the original purchaser’s warranty period, provided, as stated below, no unauthorized repairs or modifications have been performed on the product. Date of purchase is the date indicated on the invoice for the product issued by Hammertone Audio. For the warranty to be valid, a defective product must be returned to Hammertone Audio for service prior to any unauthorized attempt to repair. Any repair work on an Allnic Audio product not specifically authorized by Hammertone Audio will void the warranty on the product. ... -
Page 10: Figures
Figure 1 – L‐1500 Rear Panel View Figure 2 – L‐1500 Remote Control Figure 3 – L‐1500 Front Panel View ... - Page 11 Figure 4 – L‐1500 Internal View ...