Warranty Speck Electronics products are warranted to the original owner to be free of defects in material or workmanship. This warranty does not apply to any product subject to accident, misuse, neglect or failure to comply with normal maintenance procedures or if the serial number has been defaced, altered, or removed;...
Repacking If the product is to be shipped to Speck Electronics for service or repair, attach a tag to the product, identifying the owner and indicating the service or repair to be accomplished.
Page 6
· 2 unit cable - P/N MP50-Link2 · 3 unit cable - P/N MP50-Link4 Operator Safety Use only the PS-6 external power supply that is supplied with your X.Sum Summary mixer. Using any other power supply or power source will most definitely damage the X.Sum.
Page 7
Chapter 1 Introduction Section X.Sum General The X.Sum is a 32 x 4 line mixer that can be used for external DAW summing Description or as a line mixer for synths, samplers, and effect returns. Any of the 16 stereo channels can be assigned to either the main stereo Mix output or the stereo Mix-B output.
AC distribution, grounding, and shielding techniques. If the X.Sum is being installed into a larger studio or as a expander to a host console, it may be necessary to retain the services of someone experienced in these matters.
Page 12
Electronic equipment such as power amplifiers, power supplies (especially wall mount type), video monitors, computers, certain synths and samplers must be located away from the X.Sum and its associated cables. It may be necessary to alter the positions of certain equipment that you feel would cause buzzes or hums in the mixer system.
Page 13
100% shielding ability. All audio cable used with the X.Sum should be a 3 conductor foil shield type (2 inner conductors and a shield drain conductor). It is not recommended that the 2 conductor "off the shelf cables"...
Page 14
Chapter 2 Installation & Setup ~ This page left intentionally blank ~...
X.Sum. You should experiment with settings and routing techniques to achieve the best results for any particular situation. Your ears should be your best gauge of how to adjust the settings on the X.Sum to make the sound fit your requirements.
Operation Section Signal Flow Diagram When any future reference is made to the controls or switches of the X.Sum, it will be assumed that they have been set to their neutral positions. Use this channel signal flow diagram shown below in Figure 3 as a reference when reading the descriptions of the controls, switches, and connectors [1] through [16] in this chapter.
“0db” mark. It is recommended that the input channel be set to this "0dB" mark when the X.Sum is being used exclusively as a summing box. 2. Input Pan/Balance The larger (outer) knob of the black capped concentric pot used in conjunction...
Chapter 3 Operation Section Master Section 5. Master Level Control This pot acts as the master volume to the Mix-A output. The operation of this control does not affect the operation of the Monitor level [7]. 6. Master Mono Switch When depressed, this switch sums the left and right signal together, creating a mono composite for the Mix-A.
Page 19
An input channel cannot function in stereo unless the right input is connected. The 16 stereo input channels of the X.Sum will work with either balanced tip- ring-sleeve (TRS) ¼" plugs as or unbalanced tip-sleeve (TS) ¼" plugs.
Page 20
Ring = Low (-) Sleeve = Ground Note - All active-balanced output circuits of the X.Sum were designed for balanced lines and should only be connected to balanced inputs. If that is not possible and it is necessary to connect to an unbalanced input, care must be taken not to connect the low (-) terminal to ground.
Page 21
For power supply installation instructions, refer to the Interface & Setup Section in this manual. The following connector illustration and chart as shown in figure 6 represents the DC voltages to the 8 pin circular connector required to power the X.Sum. PIN 1 0 VDC...
Page 22
.1 amp for the 230V model. This ON/OFF power switch applies AC (mains) power to the PS-6 power 20. Power Switch supply and the X.Sum mixer. The PS-6 power supply will operate at mains voltages between 100-120 and 21. Voltage Selector Switch 220-240.
Page 23
Wiring and Other Wiring & Other General The following information is not specific to the operation of the X.Sum, but rather general information regarding the “care and feeding” of an audio system. A general discussion about AC, AC grounding, audio grounding, EMI, and quality wiring is discussed in this section.
Page 24
Chapter 4 Wiring and Other Clock noise and AC Clock noise is one of the greatest enemies of the audio racks AC system. If a computer or any microprocessor based device (most samplers and effects are) emits or somehow couples its clock signal with the neutral or earth of its own power cable, it will contaminate your AC system and carry the clock noise into other equipment;...
Page 25
The occurrence of EMI (Electro Magnetic Interference) and RFI (Radio Frequency Interference) in a contemporary studio system should be of great concern and not overlooked when installing the X.Sum. EMI is defined as any unwanted signal which adversely affects the operation of the X.Sum or your audio system.
Need help?
Do you have a question about the x.sum and is the answer not in the manual?
Questions and answers