renfin Posted May 18, 2008 Posted May 18, 2008 Currently running a yamaha rxv 2700 amp (set to 6ohms) with dali ikon 6 ohm fronts, 8 ohm centre and 8 ohm rears. Can I add 4 ohm dali surround speaker or will this cause damage to the amp. The manual says when set to 6ohm the centre, rears & surrounds must be 6 ohm or higher. What will happen if I add a 4 ohm speakers to the setup as surrounds? cheers
Serpeant Posted May 18, 2008 Posted May 18, 2008 Currently running a yamaha rxv 2700 amp (set to 6ohms) with dali ikon 6 ohm fronts, 8 ohm centre and 8 ohm rears.Can I add 4 ohm dali surround speaker or will this cause damage to the amp. The manual says when set to 6ohm the centre, rears & surrounds must be 6 ohm or higher. What will happen if I add a 4 ohm speakers to the setup as surrounds? cheers I am running 4ohm Krix speakers with my amp set to 8ohm. Amp manufacturers say I should set it to 4ohm to protect the amp, but if I aint silly and play it at rediculous levels, it shouldnt matter.
betty boop Posted May 18, 2008 Posted May 18, 2008 Currently running a yamaha rxv 2700 amp (set to 6ohms) with dali ikon 6 ohm fronts, 8 ohm centre and 8 ohm rears.Can I add 4 ohm dali surround speaker or will this cause damage to the amp. The manual says when set to 6ohm the centre, rears & surrounds must be 6 ohm or higher. What will happen if I add a 4 ohm speakers to the setup as surrounds? cheers renfin you'll be fine. unless the surrounds are big behemoths speakers with low sensitivity whihc I suspect they arent. impedance is jsut one factor. a coupel of small surrounds are hardly goign to bother the 2700. jsut be carefull with vol levels regardless and not push things too hard
renfin Posted May 18, 2008 Author Posted May 18, 2008 renfin you'll be fine. unless the surrounds are big behemoths speakers with low sensitivity whihc I suspect they arent. impedance is jsut one factor. a coupel of small surrounds are hardly goign to bother the 2700. jsut be carefull with vol levels regardless and not push things too hard They are medium tower speakers with a sensitivity of 89 db...........Must admit though, I do like to crank it up when watching movies about -10db to 15db. Will this level cause damage...
geoff888 Posted May 18, 2008 Posted May 18, 2008 renfin you'll be fine. unless the surrounds are big behemoths speakers with low sensitivity whihc I suspect they arent. impedance is jsut one factor. a coupel of small surrounds are hardly goign to bother the 2700. jsut be carefull with vol levels regardless and not push things too hard Impedance profiles and demands on an amp have nothing to do speaker size or what they are used for. You can just as easily have a small speaker with a low minimum impedance and steep phase shift that place high demands on an amp (or conversely big speakers with an easy load an an amp). They are medium tower speakers with a sensitivity of 89 db...........Must admit though, I do like to crank it up when watching movies about -10db to 15db.Will this level cause damage... If all your speakers are connected and driven at the same time and to high levels then it will most probably place high demands on your amp. Most modern amps have automatic shutdown protection circuitry to turn the amp off when the load is too demanding for it to cope. The impedance switch is there to protect your amp from needing to envoke the protection circuitry. Played at sensible levels a 4 ohms speaker should be able to be connected without the impeadance switch on the 2700 but to play it safe I would use the switch. It may save on some wear and tear....
Mr.Bitey Posted May 18, 2008 Posted May 18, 2008 Im runnin a mix of 6s and 8s and never had an issue Cheers, Smokey
betty boop Posted May 18, 2008 Posted May 18, 2008 They are medium tower speakers with a sensitivity of 89 db...........Must admit though, I do like to crank it up when watching movies about -10db to 15db.Will this level cause damage... reality is even if they were nominal 8 ohm speakers of reasonable sensitivity, given the limits of the amps in the avr, quite possibleo get into trouble and end up clipping the speakers if end up trying to drive them at highish levels the avr cant sustain. I wouldnt worry about the impedance switch. just dont push things to the limit, be sensible with the vol levels and all things should be fine. I think in another thread you mentioned a potential amp upgrade. I'd consider that anyways. the benfits brought will be not just be if pushing things in the vol levels but also at lower levels with improvement with dynamics and detail etc
Cooksta59 Posted May 18, 2008 Posted May 18, 2008 They are medium tower speakers with a sensitivity of 89 db...........Must admit though, I do like to crank it up when watching movies about -10db to 15db.Will this level cause damage... Is that +15? Whats the maximum volume setting on your avr? My old denon and new marantz are both +15 to +18 and i would never drive them that hard. It doesnt matter what amp you drive your speakers with, if you overdrive it, it clips, distorts and you risk damaging your speakers.
Volunteer Kazz Posted May 18, 2008 Volunteer Posted May 18, 2008 Is that +15? Whats the maximum volume setting on your avr? My old denon and new marantz are both +15 to +18 and i would never drive them that hard. It doesnt matter what amp you drive your speakers with, if you overdrive it, it clips, distorts and you risk damaging your speakers. Agreed and at +15 you'd be deaf. Even with the addition of the Elektra I've not gone above -5 and that is only on rare occasions.
str0be Posted May 19, 2008 Posted May 19, 2008 what if your front speakers are 4 ohm and your centre and rears are 6 ohm? what should the AVR be set at?
betty boop Posted May 19, 2008 Posted May 19, 2008 Agreed and at +15 you'd be deaf. Even with the addition of the Elektra I've not gone above -5 and that is only on rare occasions. could be he hasnt calibrated it for refernece level (75db or 85db). mines calibrated to 75db at refernce level 0db vol setting and highest I've been is -10db vol setting. could be jsut a typo from him as well he might have meant -15db vol level. what if your front speakers are 4 ohm and your centre and rears are 6 ohm? what should the AVR be set at? I used to run richter setup in that exact scenario, and never used any 4 ohm/ 6 ohm mode. the speakers and amp are still running quite happily about 9 years later now over my parents place. keep in mind too there is usually a sub operating in most scenarious which will take a fair load off the amp in driving the speakers. as mentioned before jsut operate yoru system with some care and at sensible levels, run it to the max and expect trouble ! jsut need to understand the limitations of your system, dont let it run ragged and all should be fine
renfin Posted May 19, 2008 Author Posted May 19, 2008 could be he hasnt calibrated it for refernece level (75db or 85db). mines calibrated to 75db at refernce level 0db vol setting and highest I've been is -10db vol setting. could be jsut a typo from him as well he might have meant -15db vol level. thanks guys for all your help and info..... sorry for the typo..... as Al stated, I've got my set up calibrated at 75db, so when I want the house to shake i've been known to to turn it up to -15db, the highest level is -10 which is very loud in my room.... cheers
Cooksta59 Posted May 19, 2008 Posted May 19, 2008 thanks guys for all your help and info.....sorry for the typo..... as Al stated, I've got my set up calibrated at 75db, so when I want the house to shake i've been known to to turn it up to -15db, the highest level is -10 which is very loud in my room.... cheers phew.....
CAVX Posted May 19, 2008 Posted May 19, 2008 4 Ohm speakers all round and whist I generally watch around the -15dB to -10dB, I have been known to take it to the ref 00dB level and have never had a problem... Mark
geoff888 Posted May 19, 2008 Posted May 19, 2008 4 Ohm speakers all round and whist I generally watch around the -15dB to -10dB, I have been known to take it to the ref 00dB level and have never had a problem...Mark Not all 4 ohms speakers are creates equal, some are easy to drive, others are more demanding yet they are still nominally 4 ohms. My Marantz receiver doesn't have an impedance switch. My HT standmount speakers operate mostly above 8 ohms but does dip to 5 ohms between 200-300Hz and have a (measured) sensitivity of 83dB. Either the amps in the AVRs that use impedance switches are not as "robust" or the manufacturer is being overly cautious.
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