Hybrid system - experimenting and learning

I'm slowly building my "dedicated" stereo rig that also happens to function as a 5.1 HT, and learned something this weekend. The HT is run by a slimline Marantz AVR that has front pre-outs only. The pre-outs run to a Marantz integrated amp that had been set to power amp direct mode (aka home theater bypass), so in that configuration, my Squeezebox Touch feeds the AVR a digital stereo signal, and the AVR is a preamp with DAC, sending an analog signal to the amp.

Yesterday, I changed things up a little by turning off power amp direct mode and using the full function of the integrated amp for stereo listening. In this configuration, the SBT, using its own DAC, feeds an analog signal directly to the integrated amp. Wow, the difference was not slight! What I once thought sounded pretty decent (using the AVR as a pre), is no longer palatable. Even though the SBT DAC is probably inferior to the much newer Marantz AVR DAC, it seems the preamp stage of the integrated is considerably improved. More punch, more dynamics, more stereo separation - just plain better.

The next step will likely be the HD-DAC1, to improve on the SBT DAC. There will have to be some experimentation with this configuration, too, because the HD-DAC1 can also function as a preamp. So... I'll see about that when I get there.

Anyhow, I'm very pleased so far with this arrangement. The default plan is to leave the integrated in power amp direct mode for me and the fam to enjoy TV with surround, but when I really want to enjoy my music, I can easily switch over at the touch of a button.
7.1 - polk RTi10 x 3 (LCR) : FXi3 x 2 : RTi4 x 4 : Sunfire SDS-12 : Yamaha Aventage RX-A2040 : Adcom GFA-7500 : Squeezebox Touch : DIRECTV : Roku SE : Panasonic PT-AX200U PJ @ 120"
5.1 - Definitive Technology ProMonitor 800 x 4 : ProCenter 1000 : Klipsch Sub-10 : Pioneer Elite SC-91: DIRECTV : LG OLED55B6P : Roku Premiere+
Garage Duty - polk Monitor 10s : Pioneer A-717 Integrated Amp : Squeezebox Classic

Comments

  • nooshinjohnnooshinjohn Posts: 18,227
    edited April 30
    ...
    The Gear... Carver "Statement" Mono-blocks, TriangleArt Reference SE with PS Audio NuWave Phono converter, Walker Precision Motor Drive, ClearAudio Stradivari v2 cartridge and Origin Conquerer Mk3c tonearm, Polk Audio "Signature" Reference Series 1.2TL with complete mods, Pass Labs X1 two channel preamplifier Signed by Poppa himself, PS Audio PerfectWave DAC MkII, Krell Evolution 525a CD Player, Pioneer Elite SC-65, Oppo UDP-205 Blu-ray , Sony XBR70x850B 4k, Polk audio AB700/800 "in-wall" surrounds

  • mlistens03mlistens03 Posts: 2,139
    Very interesting. I’ve never seen a “power amp mode” on a integrated before. Very nice, and keep us posted with updates!
    Not Tom, or Trey, or Jim
    NAD C352
    Monitor Audio Radius R90’s/Mission Freedom 770 IV
    BJC speaker cables, generic RCA’s, one homemade power cable, because that’s going to do any good with the rest of the generic ones.
    Technics SL3200 turntable and a Shure M97xE phono cartridge
    Velodyne VA-907 subwoofer
    Lafayette LR-1100 acting as a tuner and phono.
    I've always thought the goal of high end audio was not to have your neighbors bang on the wall and say, 'Turn that darn music down' but to have your neighbors bang on the wall and say, 'Tell your friends to go home and you can practice later this week'.
  • mdaudioguymdaudioguy Posts: 4,621
    7.1 - polk RTi10 x 3 (LCR) : FXi3 x 2 : RTi4 x 4 : Sunfire SDS-12 : Yamaha Aventage RX-A2040 : Adcom GFA-7500 : Squeezebox Touch : DIRECTV : Roku SE : Panasonic PT-AX200U PJ @ 120"
    5.1 - Definitive Technology ProMonitor 800 x 4 : ProCenter 1000 : Klipsch Sub-10 : Pioneer Elite SC-91: DIRECTV : LG OLED55B6P : Roku Premiere+
    Garage Duty - polk Monitor 10s : Pioneer A-717 Integrated Amp : Squeezebox Classic
  • mhardy6647mhardy6647 Posts: 19,034
    once upon a time separable power & preamps in integrated (stereo) amplifiers was a fairly common feature, but the driver for including such a feature in those ancient times was somewhat different.

    Here's a somewhat random example - note the "pre-out"/"main-in" jumpers on this Superscope-era Marantz 1060 (borrowed photo).

    jz06cdtgyxf7.png
  • mpitogompitogo Posts: 281
    edited May 7
    I think you got it right but check to see if you can use some sort of trigger for HT bypass on your Marantz integrated.

    HT bypass is fairly common on two channel integrated or pre-amplifiers. My Atmos 7.2.2 also doubles as a 2.0. In my case the AVR has a 12v trigger which goes into my integrated amps home theater bypass. The HT bypass trigger powers on the integrated amp and overrides the manual controls. The input is selectable between rca or balanced, since my AVR’s front left right only has RCA preouts I have it plugged into the RCA aux jack on the integrated. When the AVR powers on it puts the integrated amp in HT bypass much like a dedicated two channel amp with fixed gain. The benefits are, 1) the L/R have it’s own dedicated Amp relieving the AVR (but is fully integrated with Atmos and is also calibrated with Audyssey) 2) In two channel the integrated amp and accompanying speakers are unhindered by the superfluous audio and video processing in the AVR. Not to say that the AVR is not musical but, integrated is more suited to music.

    The 2.0 is in a way independent, the music source(s) are dedicated to it, while the video sources go into the AVR. Both can’t run at the same time.
    Music-2.0 Raidho D-3.1 | Audio Research Ref 40 | Jeff Roland 925 | Esoteric Grandioso K1 | Transparent Reference, IC, Speaker and Power | HRS SXR Rack
  • nooshinjohnnooshinjohn Posts: 18,227
    I have been very happy with my setup. I also run a hybrid system, and I have found the key to pulling it off well is to invest in a preamp of exceptional quality. I also suggest excellent amplification for the mains, allowing the amp within the receiver do the work for the other speakers.

    Bad news in my setup is that I am using tube amps for my mains, and when watching a movie, they are being wasted. If you go solid state, that will be less if a problem. My rig is used 80% music and 20% movies/tv... though for tv, I do not bother turning on the mains most of the time.
    The Gear... Carver "Statement" Mono-blocks, TriangleArt Reference SE with PS Audio NuWave Phono converter, Walker Precision Motor Drive, ClearAudio Stradivari v2 cartridge and Origin Conquerer Mk3c tonearm, Polk Audio "Signature" Reference Series 1.2TL with complete mods, Pass Labs X1 two channel preamplifier Signed by Poppa himself, PS Audio PerfectWave DAC MkII, Krell Evolution 525a CD Player, Pioneer Elite SC-65, Oppo UDP-205 Blu-ray , Sony XBR70x850B 4k, Polk audio AB700/800 "in-wall" surrounds

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