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  1. #1
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    home theater avr and music avr with 2 speakers--good tech question

    here is a good question for audiophiles...

    SETUP
    Right now I have a Marantz receiver and the front channel pre-outs from the receiver are going to a two channel amplifier which are running the front two speakers.

    I also have a seperate dedicated pre-amp for my music (cd, tape) which is also running to the SAME 2 channel amplifer.

    I am using a Y connector ( double female to single male RCA) to connect the RCA from the dedicated music preamp and also from the Marantz receiver to the 2 channel amplifier

    PROBLEM
    when I play a movie the front speakers are not very loud even if i increase the volume in the Marantz setup screen.

    If I disconnect the rca's that come from the the dedicated music preamp the volume is perfect


    So basically I am using my 2 channel amplifier to power my front speakers for music and home theater

    Option
    If I only use my 2 channel amplifier to power the speakers for the music and use the receiver to power my front speakers, the marantz is going into safe mode.

    Appreciate your input, what do I do??
    thank you for reading...

  2. #2
    Forum Regular blackraven's Avatar
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    You need an amp or preamp switcher like this-

    Niles Audio AXP-1 Auxiliary Input Selector - Smarthome

    The Decware Zen Switchbox model ZSB

    Kramer 4X4A 4x1 Audio Switcher and 1 4 Distribution Amplifier Xcaseproaudio | eBay


    I had the same problem until I had a Home theater bypass switch installed in my main preamp.
    Pass Labs X250 amp, BAT Vk-51se Preamp,
    Thorens TD-145 TT, Bellari phono preamp, Nagaoka MP-200 Cartridge
    Magnepan QR1.6 speakers
    Luxman DA-06 DAC
    Van Alstine Ultra Plus Hybrid Tube DAC
    Dual Martin Logan Original Dynamo Subs
    Parasound A21 amp
    Vintage Luxman T-110 tuner
    Magnepan MMG's, Grant Fidelity DAC-11, Class D CDA254 amp
    Monitor Audio S1 speakers, PSB B6 speakers
    Vintage Technic's Integrated amp
    Music Hall 25.2 CDP
    Adcom GFR 700 AVR
    Cables- Cardas, Silnote, BJC
    Velodyne CHT 8 sub

  3. #3
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    As you are finding out, you cannot connect two preamps to one amp, nor can you connect two amps to one set of speakers, this could have blown your amp and receiver, thankfully the protection worked.

    If your preamp doesn't have a home theater bypass you can use the tape monitor loop, push the tape loop on when watching movies and connect the receiver pre outs into the tape input, you'll have to keep the volume level on the stereo preamp the same each time after calibrating the receiver. Actually, thinking about it you shouldn't have to worry about the volume of the preamp using the tape loop. If you use some other input you would.

    Or, what I do is have two systems but connect/disconnect at the back of the speaker depending on which system I'm using. Easy with banana plugs.

  4. #4
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    To clarify once you have the receiver connected to the tape loop you can leave it that way and use the tape monitor switch to choose which system is used. When on it will pass the receiver signal, when off the stereo will operate as normal.

  5. #5
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    quick clearification

    home theater avr and music avr with 2 speakers--good tech question-myryad.jpgMr Peabody
    appreciate the help/advice in short you are recommending:
    connect the front channel pre- outs from my receiver to the pre amp tape input? ( which is the "play" input on the top of the picture)

    connect my cd player to the cd input on the back of my pre amp?

    On my Pre-amp press tape to listen/watch movies press cd to listen to music?

    here is a picture of my pre-amp

    equipment
    marantz 5008 receiver
    adcom gfa 555 amplifier
    myriad 100 pre-amp
    B&W CM9 speakers
    PSB surround
    Cambridge Audio CD player
    Nakamichi 680zx tape
    Rotel tuner

  6. #6
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    I do something similar.

    I have a dedicated 2Ch setup with Pre and Amp driving mains
    I have an HT receiver driving Rears, Center, and Sub
    I run the Front L/R Pre outs to an Input on my Pre
    I set the Volume on 2CH pre to about 1pm to match volume of HT
    I also run my Sub thru an old Realistic AV switchbox so I can flip it one way for HT and the other way if I want it in my 2CH setup

    My pre does not have HT Bypass and I use a regular input without issues (although my Integra 30.3 is in the repair center now because it lost all sound output...hopefully not from the way I was using the Pre Outs)

  7. #7
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    Hi Hyfi
    thanks for the input.. have you ever run it the way mr peabody recommended? your way definitely works but then every time you decrease the volume on your receiver you also have to adjust it on the pre-amp also. I think Mr. Peabody way, there is no need to adjust the volume on the preamp and receiver

  8. #8
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    Quote Originally Posted by bipper View Post
    Hi Hyfi
    thanks for the input.. have you ever run it the way mr peabody recommended? your way definitely works but then every time you decrease the volume on your receiver you also have to adjust it on the pre-amp also. I think Mr. Peabody way, there is no need to adjust the volume on the preamp and receiver
    No, once I set the volume on the main pre to about 1pm, the volume from the HT handles it perfectly. When I get the unit back I will play with the Tape Loop input to see if there is a difference. My pre has dual volume knobs with click positions so I have it marked.

  9. #9
    Forum Regular blackraven's Avatar
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    Just get the Niles switcher and you won't have to worry about matching volumes. Run both preamp outs into the box and the output to the amp. I used one of these and did not notice any degradation of sound.

    You can buy it here at a discount for $64

    Niles AXP1 Auxiliary Input Selector
    Pass Labs X250 amp, BAT Vk-51se Preamp,
    Thorens TD-145 TT, Bellari phono preamp, Nagaoka MP-200 Cartridge
    Magnepan QR1.6 speakers
    Luxman DA-06 DAC
    Van Alstine Ultra Plus Hybrid Tube DAC
    Dual Martin Logan Original Dynamo Subs
    Parasound A21 amp
    Vintage Luxman T-110 tuner
    Magnepan MMG's, Grant Fidelity DAC-11, Class D CDA254 amp
    Monitor Audio S1 speakers, PSB B6 speakers
    Vintage Technic's Integrated amp
    Music Hall 25.2 CDP
    Adcom GFR 700 AVR
    Cables- Cardas, Silnote, BJC
    Velodyne CHT 8 sub

  10. #10
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    You got it.
    Pretty nice set up.
    Quote Originally Posted by bipper View Post
    Click image for larger version. 

Name:	myryad.jpg 
Views:	74 
Size:	87.4 KB 
ID:	9527Mr Peabody
    appreciate the help/advice in short you are recommending:
    connect the front channel pre- outs from my receiver to the pre amp tape input? ( which is the "play" input on the top of the picture)

    connect my cd player to the cd input on the back of my pre amp?

    On my Pre-amp press tape to listen/watch movies press cd to listen to music?

    here is a picture of my pre-amp

    equipment
    marantz 5008 receiver
    adcom gfa 555 amplifier
    myriad 100 pre-amp
    B&W CM9 speakers
    PSB surround
    Cambridge Audio CD player
    Nakamichi 680zx tape
    Rotel tuner

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