Greig
Auditioning
- Joined
- May 8, 2006
- Messages
- 4
Does anyone have first hand experience with setting up multi-speaker per channel for Surrounds?
I am setting up 7.1 +Presence in a 13’x 22’room using -
* for SPKR SYSTEM A:
- 3x Jensen EHT-8 130W 6 ohm in walls for front stage
- 2 EHT-6 110w 6 ohm for Presence speakers (to my Yamaha RX-V2600 AVR),
- 2 home made subs, and
- 6 EHT-4 110w x 6 ohm 40 degree- angled drivers in wall or ceiling (not yet sure) for (side) SURROUNDS: THE PROBLEM (see below)
- 2 EHT-4 110w x 6 ohm 40 degree- angled drivers in wall or ceiling (not yet sure) for REAR surrounds.
SYSTEM B: is my old pair of 5spkr x 4way Sansui SP1500 for stereo listening.
Here’s the 7.1 problem area – I have 3 rows of seating so I have been trying to emulate the “multiple side” speakers in commercial theaters so that every row has the correct positioned (side) surrounds (i.e. before I came to know that comm Theatres us 10.2 and have all active (amplified) speakers). So I am trying to place 3 pairs of Surrounds along each side wall at 90 -110 degrees to each row. So do I wire –
•3x PARALLEL, or
•3 x SERIES, or
•2x SERIES + 1 x PARALLEL, or
•2 x PARALLEL + 1 x SERIES, or
•Use an Impedance Compensation device of some sort (and what should/does that present as an impedance value to the surround channels of the AVR?)
See I don’t want to cause EQ issues for the YPAO system, or degrade sound quality, or affect the “relative” volumes of SL and SR compared to the other channels for the listeners in each of the rows.
Thoughts thus far: My first thought was to maintain 6 ohm load/surround-channel to be seen by the AVR so I don’t introduce quality/balance or danger problems to the AVR. To do this I can’t just wire as 3in Para = 2 ohm, 3 in Ser =18ohm, 2 Para + 1 Ser = 9 ohm, and 2 Ser + 1 Para = 9 ohm (Right???). So I’ve hunted for a “black box” only end up buying on recommendation (?) a no-brand one (1pr -> 4 pr) from Radio Shack/Tandy that was supposed to use combinations of series and parallel (?????) to maintain the impedance seen by the AVR at the same value as “the lowest impedance speaker in the array”. BUT it does not do that. I hooked them up and made measurements –
•2 SPEAKERS-
oSwitch 1 +2 = 6 -> 12ohm (obviously just series);
oSwitch 3+4 = same (series);
oeither (1 or 2) + either (3 or 4) =
I am setting up 7.1 +Presence in a 13’x 22’room using -
* for SPKR SYSTEM A:
- 3x Jensen EHT-8 130W 6 ohm in walls for front stage
- 2 EHT-6 110w 6 ohm for Presence speakers (to my Yamaha RX-V2600 AVR),
- 2 home made subs, and
- 6 EHT-4 110w x 6 ohm 40 degree- angled drivers in wall or ceiling (not yet sure) for (side) SURROUNDS: THE PROBLEM (see below)
- 2 EHT-4 110w x 6 ohm 40 degree- angled drivers in wall or ceiling (not yet sure) for REAR surrounds.
SYSTEM B: is my old pair of 5spkr x 4way Sansui SP1500 for stereo listening.
Here’s the 7.1 problem area – I have 3 rows of seating so I have been trying to emulate the “multiple side” speakers in commercial theaters so that every row has the correct positioned (side) surrounds (i.e. before I came to know that comm Theatres us 10.2 and have all active (amplified) speakers). So I am trying to place 3 pairs of Surrounds along each side wall at 90 -110 degrees to each row. So do I wire –
•3x PARALLEL, or
•3 x SERIES, or
•2x SERIES + 1 x PARALLEL, or
•2 x PARALLEL + 1 x SERIES, or
•Use an Impedance Compensation device of some sort (and what should/does that present as an impedance value to the surround channels of the AVR?)
See I don’t want to cause EQ issues for the YPAO system, or degrade sound quality, or affect the “relative” volumes of SL and SR compared to the other channels for the listeners in each of the rows.
Thoughts thus far: My first thought was to maintain 6 ohm load/surround-channel to be seen by the AVR so I don’t introduce quality/balance or danger problems to the AVR. To do this I can’t just wire as 3in Para = 2 ohm, 3 in Ser =18ohm, 2 Para + 1 Ser = 9 ohm, and 2 Ser + 1 Para = 9 ohm (Right???). So I’ve hunted for a “black box” only end up buying on recommendation (?) a no-brand one (1pr -> 4 pr) from Radio Shack/Tandy that was supposed to use combinations of series and parallel (?????) to maintain the impedance seen by the AVR at the same value as “the lowest impedance speaker in the array”. BUT it does not do that. I hooked them up and made measurements –
•2 SPEAKERS-
oSwitch 1 +2 = 6 -> 12ohm (obviously just series);
oSwitch 3+4 = same (series);
oeither (1 or 2) + either (3 or 4) =