Bi-Amp Question - utilizing integrated amp

Javamanad

I wanted to exploit the full potential of my system on my new RTi 12 speakers.

Anyone familiar with bi-amping a Sansui AU-717 or AU-519? There's a switch on the back that allows for breaking the pre-amp/amp connection for such, but I'm not sure which setting to use.
1. connected
2. direct coupled
3. separated
4. capacitor coupled

I'd like to use the AU-717 to connect my CD player to and also for the volume control, then connect a separate power amp to the Pre-In/Main-Out on the back.

Anyone try this with a Sansui or similar Integrated Amp?

Here's a definition of the switch choices on the back of the AU-717:

CONNECTED means that the preamp is connected to the power amp internally. The remaining two positions disconnects the preamp from the power amp and allows you to input signals externally as follows:

DIRECT COUPLED: the unit's power amp works as a "DC" amplifier, or
CAPACITOR COUPLED: a capacitor is connected at the input of the unit's power amp.

Thanks !

ward91

why can things never be simple.

try them both, im not too sure to be honest with you but will the capacitor be there to remove any dc in the signal.
try them both with "lesser" speakers maby, hopefuly somebody here will be of more help.

heyjude8er

Javamanad wrote: »

I wanted to exploit the full potential of my system on my new RTi 12 speakers.

Anyone familiar with bi-amping a Sansui AU-717 or AU-519? There's a switch on the back that allows for breaking the pre-amp/amp connection for such, but I'm not sure which setting to use.
1. connected
2. direct coupled
3. separated
4. capacitor coupled

I'd like to use the AU-717 to connect my CD player to and also for the volume control, then connect a separate power amp to the Pre-In/Main-Out on the back.

Anyone try this with a Sansui or similar Integrated Amp?

Here's a definition of the switch choices on the back of the AU-717:

CONNECTED means that the preamp is connected to the power amp internally. The remaining two positions disconnects the preamp from the power amp and allows you to input signals externally as follows:

DIRECT COUPLED: the unit's power amp works as a "DC" amplifier, or
CAPACITOR COUPLED: a capacitor is connected at the input of the unit's power amp.

Thanks !

I have a Sansui AU-717 integrated amp along with the SU-717 am/fm tuner.This amp was designed and built during the years of the "quadrophonic" craze.It delivers 340 watts into four seperate channels(85 watts per channel) I bi-amped this amp to my Polk Audio Monitor 70's.You don't need to change the switch.Just run two speaker cables to each speaker using the bi-amp terminals on back of the speaker,taking care to run positive to + and negative to -.You will have two cables coming from the Left terminals (on back of amp) to your left speaker and two cables from the Right terminals on back of amp to the right speakers.I have mine set up this way and it sounds awesome! You will effectively be running your speakers at 170 watts per channel.The total harmonic distortion of this amp is rated at only .00015.That's really low.It delivers clean,pure power.Coupled with the Sansui integrated amp these Monitor 70 speakers sound fantastic.Anyone wishing to buy the Sansui amp can sometimes find them on ebay.I bought the Polk Audio Monitor 70's on closeout at Circuit City for only $400.00 for the pair.I felt like I was Stealing! What a great pair of speaks!

WilliamM2

.Just run two speaker cables to each speaker using the bi-amp terminals on back of the speaker,taking care to run positive to + and negative to -.You will have two cables coming from the Left terminals (on back of amp) to your left speaker and two cables from the Right terminals on back of amp to the right speakers.I have mine set up this way and it sounds awesome! You will effectively be running your speakers at 170 watts per channel.

Unless I'm misreading that, it sounds like bi-wiring, not bi-amping.

heyjude8er

Javamanad wrote: »

I wanted to exploit the full potential of my system on my new RTi 12 speakers.

Anyone familiar with bi-amping a Sansui AU-717 or AU-519? There's a switch on the back that allows for breaking the pre-amp/amp connection for such, but I'm not sure which setting to use.
1. connected
2. direct coupled
3. separated
4. capacitor coupled

I'd like to use the AU-717 to connect my CD player to and also for the volume control, then connect a separate power amp to the Pre-In/Main-Out on the back.

Anyone try this with a Sansui or similar Integrated Amp?

Here's a definition of the switch choices on the back of the AU-717:

CONNECTED means that the preamp is connected to the power amp internally. The remaining two positions disconnects the preamp from the power amp and allows you to input signals externally as follows:

DIRECT COUPLED: the unit's power amp works as a "DC" amplifier, or
CAPACITOR COUPLED: a capacitor is connected at the input of the unit's power amp.

Thanks !

Javamanad,here's some info I gleaned from a copy of the original owner's manual I purchased on Ebay for the Sansui Au-717 integrated Amp.Unit's power amplifier:The unit's power amplifier is of the "DC" configuration with capacitors eliminated.Since capacitors are eliminated,phase distortion is reduced.Since a DC amplifier has a bandwith from DC (direct current) to high frequencies,it features a wide bandwith,low distortion and improved phase response. DC components,when applied at the input of a power amplifier may break connected speakers or apply undue force to such speakers.To protect the speakers,therefore,a protecter will be activated and speakers will emit no sound.When an equipment is connected to the units POWER AMP IN and the built in protection is activated - meaning there are DC components at the equipments output -- slide the PRE-POWER AMP switch to Capacitor Coupled. Separation of preamplifier and power amplifier:With the unit,it is possible to electrically separate it's preamplifier section from it's power amplifier section and use each section independently of the other.To separate these two sections,loosen the rear panel screw (positioned below the "PRE-POWER AMP" inscription) and set the sliding switch to the SEPARATED position.(The SEPARATED position actually has two positions;more about it later. With the slider set to SEPARATED,another preamplifier may be connected to the unit's power amplifier,or another power amplifier to the unit's preamplifier or it's also possible to build a multi-amp (electronic crossover ) system.As noted earlier,the slider has two positions,DIRECT COUPLED and CAPACITOR COUPLED,under it's SEPARATED inscription. DIRECT COUPLED : The unit's power amplifier works as a DC amplifier;the amplification range starts with DC (direct current). When a DC component appears at the output of a connected equipment and therefore at the input of the unit's power amplifier,protection will be activated to protect connected speakers. CAPACITOR COUPLED: A capacitor is connected at the input of the unit's power amplifier to eliminate DC components. AC outlets:Of the three AC outlets provided on the rear panel,the one marked "SWITCHED" is controlled by the front panel POWER switch.It is convenient to use it to power a program source component such as your turntable,etc. The other two AC outlets ,marked "UNSWITCHED",are not controlled by the unit's POWER switch,so long as the unit is connected to a wall outlet,the connected components are also powered. The "SWITCHED" and "UNSWITCHED" outlets have a capacity of 100 watts and 250 watts respectively.DO NOT connect any component whose power consumption exceeds the capacvity of each outlet,as it is extremely dangerous.The power consumption rating is usually listed in the specification chart of the component,or sometimes on the equipment itself.Be sure to check the rating. In case you have connected a component to one of the unit's AC outlets and then another component to the first components AC outlet,be sure to add the second components rated power consumption to the consumption of the components connected to the unit itself. The unit requires a little longer time(about ten seconds) on power on than most other amplifiers to stabilize it's voltage in it's circuits.When you use the units preamplifier with another power amplifier,first power on this unit and then the power amplifier after about a ten second interval.When turning off both amplifiers,first power off the power amplifier and then the preamplifier. When you use the unit's preamplifier only,connect it's PRE-OUT terminals and a power amplifiers input terminals. Before you turn the POWER switch on or off,be sure to turn the volime control completely counterclockwise. When you use the unit's power (main) amplifier only,connect it's POWER AMP-IN terminals with a control preamplifiers output terminals. When you build a multi-amplifier system,connect the unit's PRE-OUT terminals and a channel dividers (electronic crossover) input terminals,and the unit's POWER AMP-IN terminals and the channel divider's output terminals. The preceeding information was copied word for word from a copy of the original owner's manual so it should be very accurate.I hope this info is of help to you.God Bless You and have a great day. James the Lesser.

heyjude8er

A quick correction.The Sansui AU-717 Integrated Amplifier is listed at .0015% THD,not 00015%.