Author Topic: Bose Invisable Amp Needed  (Read 14550 times)

Steve Huber Co-Admin

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Bose Invisable Amp Needed
« on: October 31, 2014, 01:14:32 AM »
Since I've got the passenger side of my dash completely torn apart fighting a fan speed / air flow problem (got it figured out thanks to Gerald's advice!) I have complete access to my Bose amp, which has been giving me problems since I've had the coach. The Center channel drops out after it heats up. Checked with Bose and they no longer repair them. So, does anyone have a working unit that they pulled out during an upgrade they would be willing to part with?
I know I can upgrade but the convenience of the Lifestyle unit is nice and the wiring and speaker replacement would be a pain I'd like to avoid if possible.
Thx, Steve
Steve
2015-          07 Contessa Bayshore C9,  400 hp
2013-2015: 00 Marquis Tourmaline, C12, 425 hp
2005-2013: 01 Contessa Naples, 3126B, 330 hp
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Dick Simonis

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Re: Bose Invisable Amp Needed
« Reply #1 on: October 31, 2014, 02:29:05 AM »
Steve, there is a dept of Bose that reconditioned my amp and Lifestyle head.  In fact they help Beaver design the system for the 2000 era coaches.  The problem was they were hard to locate in the corporate structure and I was told initially they would not repair the units until I found this department.

I'll dig back through my correspondence and see if I find the info.

Dick Simonis

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Re: Bose Invisable Amp Needed
« Reply #2 on: October 31, 2014, 02:31:44 AM »
Found it.

"Hi Mr. Simonis,

Per our conversation, we can repair your Bose Built-Invisible Home Theater amp for a flat rate of $250 plus tax. If you decide you want to send your LifeStyle music center in at the same time, the flat rate is $259 (for both units).

The best number for Bose Built-Invisible support is 877-633-4405. We hope to hear from you soon.

 

Take care,

 

Peter Behravesh

Bose Product And Technical Support Specialist III

Advanced Technical Group"

Steve Huber Co-Admin

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Re: Bose Invisable Amp Needed
« Reply #3 on: October 31, 2014, 04:02:16 AM »
Dick,
That is the # I called. Got it from a previous post on the forum. Was told no joy on repairing my amp.
Hmmm,  Steve
Steve
2015-          07 Contessa Bayshore C9,  400 hp
2013-2015: 00 Marquis Tourmaline, C12, 425 hp
2005-2013: 01 Contessa Naples, 3126B, 330 hp

JimNCheryl Domenoe

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Re: Bose Invisable Amp Needed
« Reply #4 on: October 31, 2014, 05:10:16 AM »
I just had mine removed to have a new system installed. Seemed to work fine. Let me know if you want it.  I don't think they tossed it yet.  I'll know for sure in the morning.

Edward Buker

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Re: Bose Invisable Amp Needed
« Reply #5 on: October 31, 2014, 05:32:32 AM »
Steve,

Bose uses some steering logic and it is not true dolby digital 5.1. Depending on the unit era it may be far from it but will still sound quite good. Before scrapping it try paralleling the speaker leads at the amp end removing the center channel speaker and paralleling it with a right or left. In one or another of the speaker modes you may find little difference in sound and it is worth a try. You will halve the impedance of the speaker to the amp which may up its output a little but I doubt that it would care much. That will avoid the drop outs that you have been hearing which are noticeable.

BTW what was the advice and problem that you found with the fan?

Later Ed

Steve Huber Co-Admin

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Re: Bose Invisable Amp Needed
« Reply #6 on: October 31, 2014, 06:24:10 AM »
Jim,
Let me know if it is available. I'd like to get it.

Ed,
Will try tying  right and center together. For a while I had switched right and center but DW is starting to complain about erratic loss of sound so need to fix it.

The fan has been an "adventure". Driver's side gave me good volume but not passenger side. Both had same voltage at input. Switched fans, no joy. then decided it must be a blocked duct or air leak. Pulled ducting, everything looked good. Diverter box worked correctly. Went back to voltage. Both fans getting about 10.5 V on high. But driver's air duct much shorter with vents closer to fan, probably giving the better flow. Spoke with Gerald and he suggested adding relay to supply battery voltage to fan when in High position, bypassing resistor and using High signal wire from switch to drive relay. Fan runs significantly faster with battery voltage applied. Will finish wiring tomorrow.

Steve
Steve
2015-          07 Contessa Bayshore C9,  400 hp
2013-2015: 00 Marquis Tourmaline, C12, 425 hp
2005-2013: 01 Contessa Naples, 3126B, 330 hp

Edward Buker

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Re: Bose Invisable Amp Needed
« Reply #7 on: October 31, 2014, 04:22:13 PM »
Good idea Gerald had. Your wife will have her hair flow back hair in the wind now like the models do with all that fan power :-)

Voltage drop in these motor home applications are an issue. They do not want to pay for proper wire sizes adjusting for voltage drops...

Later Ed

Steve Huber Co-Admin

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Re: Bose Invisable Amp Needed
« Reply #8 on: November 01, 2014, 03:56:24 AM »
And the "adventure" continues.

Good news: Finished installation of relay circuit and am now getting ignition buss bar voltage at fan. Fan noise has increased as one would expect when running faster. Also got the wiring diagram of the dash AC/heat circuitry from Ken Carpenter. Original circuit also used relay but the voltage supply ran through a number of crimps as it feeds all 9 relays in circuitry. Also now I know what those relays at the front of my elec. bay are for.

Bad news:  No appreciable increase in air flow/volume. (Arrgg..). Since I know fan motor, squirrel cage, and ducting are ok, it almost has got to be that I'm not getting enough air into the input plenum. Had the heater core replaced a while ago so wondering if they somehow managed to seal off the air input to the plenum. Will try to wedge myself up there tomorrow to see what I can see.

Good news: Think I solved the Bose amp problem. While reassembling the dash I moved some wires and found that a couple of the wires were barely connected, just a couple of strands. Ran it for a couple hours today listening to the excellent IMHO music of Thomas Micheal Riley who entertained us at the Kerrville rally. No problem so far.

Guess 2 out of 3 aint bad.....  
BTW, if anyone wants a copy of the dash HVAC circuitry, let me know and I'll email it to you.
Steve
Steve
2015-          07 Contessa Bayshore C9,  400 hp
2013-2015: 00 Marquis Tourmaline, C12, 425 hp
2005-2013: 01 Contessa Naples, 3126B, 330 hp

Steve Huber Co-Admin

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Re: Bose Invisable Amp Needed
« Reply #9 on: November 12, 2014, 02:36:07 AM »
Repair shop (yeah, I gave up on it) figured out why I wasn't getting good air flow out of the passenger dash vents. The squirrel cage vanes were canted in the wrong direction. Apparently the marquis uses one right and one left canted squirrel cage for passenger and driver fans.
Steve
Steve
2015-          07 Contessa Bayshore C9,  400 hp
2013-2015: 00 Marquis Tourmaline, C12, 425 hp
2005-2013: 01 Contessa Naples, 3126B, 330 hp

Edward Buker

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Re: Bose Invisable Amp Needed
« Reply #10 on: November 12, 2014, 03:14:27 AM »
Steve,

These are series wound motors, try reversing the leads after verifying that the 12V positive leads would be isolated from any grounded frame. The motor may be mounted in plastic plenum which could possibly work also. If reversing directions would provide the air flow that you were looking for you still may be able to get there from here.....

Later Ed

Steve Huber Co-Admin

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Re: Bose Invisable Amp Needed
« Reply #11 on: November 12, 2014, 03:27:15 AM »
Ed,
I thought of that today. Motor housing is metal. Will check tomorrow w/meter.
BTW, forgot to mention in earlier post that I replaced the 3K ohm external resistor on the amp based on Bose's advice and so far so good.
Steve
Steve
2015-          07 Contessa Bayshore C9,  400 hp
2013-2015: 00 Marquis Tourmaline, C12, 425 hp
2005-2013: 01 Contessa Naples, 3126B, 330 hp

Edward Buker

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Re: Bose Invisable Amp Needed
« Reply #12 on: November 12, 2014, 09:39:38 PM »
Great on the Bose, good luck on the blower.

Later Ed

Steve Huber Co-Admin

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Re: Bose Invisable Amp Needed
« Reply #13 on: November 16, 2014, 09:14:25 PM »
Ed,
Thanks for the tip re reversing the motor. Tried it today and fan blew like it should! The new squirrel cage with the reversed canting on the blades helped some and the reversed motor rotation fixed it completely. Will leave the motor on the new relay circuit to get max voltage.
Thx again!
Steve
Steve
2015-          07 Contessa Bayshore C9,  400 hp
2013-2015: 00 Marquis Tourmaline, C12, 425 hp
2005-2013: 01 Contessa Naples, 3126B, 330 hp

Edward Buker

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Re: Bose Invisable Amp Needed
« Reply #14 on: November 17, 2014, 12:41:31 AM »
"Tays in the wind"......your wife better fasten her seat belt :-)

Later Ed