Knoll MVP44a User Manual

Specifications
MVP44a 8 Channel Power Amplifier

Inputs: 4 pairs of gold RCA jacks
Input impedance: 24 k ohms
Outputs: Gold 5 way Binding posts
Output power: 50 watts RMS per channel (8 ohms)
Peak output power: 100 watts RMS per channel (8 ohms)
Ideal impedance: 6-8 ohms
Freq. response: 10 Hz - 40 kHz +/- 1 dB (1w)
S/N ratio: over 105 dB A weighted 50 watts
THD distortion: <0.1% 20 Hz to 20 kHz
IMD distortion <0.01% 60 Hz 7 kHz 4:1 (SMPTE)
Trigger control: 12VDC output 60mA max.
Power: 750 watts 117 VAC
Dimensions: 17" x 3.5" x 10.5"
Weight: 22 lbs (10 kg)
Operating Temp: -20C to +60C (-4F to +140F)

Caution: Never listen to sound that is distorted. If distorted sound

is heard, turn the volume down immediately or speaker
and/or amplifier damage could occur that is not covered by the
warranty. If this problem persists, contact your dealer.

systems

MVP44a

Four stereo power amplifiers with

individual volume control electronics

and four input source selection

INSTALLATION

Limited Warranty

Knöll Systems warrants the its electronic products except projectors sold in Canada and the
USA by authorized Knöll dealers to be free from defects in materials and workmanship. This
warranty extends for three full years from the date of purchase by the consumer. Any
products returned freight prepaid to Knöll Systems and found to be defective by Knöll
Systems within the warranty period will be repaired or replaced at Knöll Systems option, at
no charge. Knöll Systems will not be responsible for the actual cost of installation or removal
of the product, nor for any consequential or incidental damages. Some states do not allow the
exclusion or limitation of incidental or consequential damages, so the above limitation or
exclusion may not apply to you. This warranty gives you specific legal rights. You may have
additional rights which vary from state to state. Knöll products sold outside of Canada and
the USA may be covered by warranties provided by an authorized Knöll distributor. Please
contact the distributor in the country that the Knöll product was purchased.

Printed in Canada

Knöll Systems, Richmond, BC & Point Roberts WA

COPYRIGHT 1998-2003, Knöll Systems, All Rights Reserved

C

Knöll Systems

tel [phone]
fax [phone]

In America:

145 Tyee Drive, #1206
Point Roberts, WA 98281

In Canada:

11791 Machrina Way #120
Richmond, B.C. V7A 4V3

MANUAL

It is very important to use a top quality

RJ45 8/8 crimper tool. We strongly

suggest using a cat 5 / RJ45 electronic

tester to verify the wire conductors.

Complies with part 15 of the FCC rules. Operation is subject to:

1. This device may not cause harmful interference

2. This device must accept any interference received
including interference that may cause undesired operation.

Version 3.3

Congratulations and thank you for choosing the Knöll
MVP44a power amplifier. The MVP44a is designed to meet
the amplifier needs of custom installed multi-zone systems
where high quality sound is a specific requirement as well
as ease of installation and operation. A six output zone
model is available, MVP64a.

Troubleshooting

If a problem is encountered with the MVP44a, the most expedient
procedure is to locate the problem and if possible repair it before
requesting service. Be sure to carefully check other system
components such as controllers, CD players, volume controls, wiring,
speakers, etc. that may be at fault.

Key Features:

1. Individual zone, four source selection. Each of the four rooms

can select any of the four stereo sources.

2. Individual mute, volume, bass, treble and balance adjustment.

Each of the four stereo channels feature adjustments for bass, treble and
balance. Individual room keypads control volume and mute. Any keypad
can turn the whole system on or off.

3. Cost and size efficiency. The MVP44a consists of a total of four

stereo power amplifiers with individual volume control electronics in a 3­1/2" enclosure. Each power amplifier channel can deliver 50 watts RMS.

4. Automatic protection circuitry. Each MVP44a channel is

individually and fully protected against low impedance, overheating,
overloading, overvoltage and undervoltage. The protection circuitry
automatically restores the amplifier channel as soon as its parameter
returns to the safe operating area.

5. External trigger and functions out. An 12VDC trigger output is

provided to turn other components on or off. Six function ports are
provided (connects to a 590-00) to turn on and off components via IR as
well as provide four IR commands, source from the MR60 keypads

6. Stackable 17" chassis. The MVP44a can be stacked or placed in a

19" EIA equipment rack (requires RK-AMP kit).

7. Data port. For larger systems, multiple MVP44a's can operate in

tandem so all MVP44's turn off and on together and share infrared
signals, page, connect to door chimes, connect to external controllers, etc.

8. Cooling fan. Fans maximize system performance and helps to avoid

early protection system distortion.

9. All on and all off. MR60 keypads turn on any source in all rooms.

10. Volume level indication. MR60 keypads display volume level on

top three rows of buttons. FNC-MUTE level is the lowest.

11. All room volume up and down (rooms on only) via FNC button.

Problem Action

Power indicator does 1. Check that the MVP44a is plugged in.
not light - no sound 2. Test the AC outlet with a lamp..

3. Check that the MVP44a power button is
on (in).

Sound cuts out 1. Verify speaker impedance is 4-16 ohms.

Changing speakers may be required.

2. Check if the MVP44a feels hot. If it's
hot, increase cooling - see Installation.

Sound is distorted 1. Turn the volume down

2. Check speakers for damage.

3. Check inputs for proper levels.
Source output levels may need adjustment.

4. Speakers may have less than 4 ohm rating

5. If inputs are Y corded to another MVP44a
or stereo receiver, make sure all amps are
turned on or a MR24 buffer may be required.

MVP44a does not 1. Press any MR60 keypad "OFF" button or
turn off RB8 remote "POWER" button for 5 seconds.

The MVP44a should power down and the
MVP44a led turns orange (standby). Before
turning the MVP44a power switch off (out)
we suggest that the MVP44a be in standby

Speaker pops when 1. Speaker may need resistor placed across
amp turned on or off terminal. We suggest 2k0 1/4 w resistor

which discharges the speakers internal
capacitor.

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15

possible in the sequence to give the components settling time. For
example, sequence a power-on command: CD on, tuner on, and CD
play rather than CD on, CD play, and tuner ON.

7. Make sure the PROGRAM lamp is on.

8. Make sure the bank 1 switch is on and bank 2, 3 and 4 are off.

9. Push the SEQ (sequence) button.

10. Carefully touch (for one sec.) the wire to the bank 1 + terminal
1 to 6 where the first sequence is to be stored.

11. Move the bank 1 switch off and the bank 2 switch on.

12. Touch the wire to the terminal where the first IR signal of the
sequence is stored (for one second). Touch the wire to the
terminal where the second IR signal of the sequence is stored
(for one second). Touch any other terminals until the entire
command sequence is stored.

13. Push the SEQ button and then the PGM button to leave the
program mode (lamp goes out).

14. Move the bank 1 switch to on and bank 2, 3, and 4 to off.
The sequence is now complete.

15. Repeat steps 7 to 14 for each of the other sequences.

Note: 590-00 programming should be fully tested. Occasionally one
source component gets out of sequence especially if IR remote
controls are used (most often when using the remote to turn on and
off source components). The system user should be shown how to
correct for a source component getting out of sequence.

System layout considerations

The MVP44a is the heart of a whole home music system. A MVP44a
is designed to work with 1-4 rooms or zones. Up to three MVP44a's
can be ganged together to allow up to 12 rooms or zones each
individually controlling one or two pairs of enclosure or inwall
speakers. Connection is achieved via the data port using a stereo

3.5mm jack on the rear of the MVP44a.

Rooms are usually controlled by a MR60 keypad. The keypads are
not intented for outdoor use. The MR60 contains an almost all
brand infrared repeater and most functions can be controlled by the
Knoll RB8 remote control. RB8 commands can easily be stored in a
learning remote. The MR60 is available with three different source
layouts (all of the MR60 keypads in one system have to have the
same source layout) and three bezel colors white, almond and ivory
for a total of 9 models. The source layout and bezel colors are easy to
change in the field.

Some rooms will not require a MR60 keypad and most MVP44a
functions can be utilized with an RB8 remote and an infrared
repeater (a MR173 IR converter is required). Up to three IR
receivers in three different rooms can be connected to a single
MR173. The MVP44a includes an internal four single or dual emitter
connection block, so emitters will have to be ordered if required. The
infrared pass through is always available when the amplifier is turned
on and in standby or powered up.

Caution: The MVP44a contains no user serviceable parts, so

do not attempt to open or repair the MVP44a. Refer servicing to
a qualified technician only or contact the factory for information.

14

Follow directions from the speaker manufacturers when deciding
speaker locations.

Note: The MVP44a prefers 6-8 ohm speaker loads. Connecting to
4 ohm loads won't hurt the MVP44a but those channels connected
to 4 ohm loads may occasionally shut down due to overloading.

Never connect the MVP44a to 2 ohm loads.

The MVP44a has a cooling fan to increase long term power output
and reliability.

...continued

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