HalusN8er Posted February 16, 2018 Share Posted February 16, 2018 Hey guys. New here and to Klipsch speakers. Anyway, to the point. I just ordered a pair of Klipsch R- 26f speakers. I am currently using a Marantz MR 235 stereo receiver. Specs on that receiver are: Power output: 30 watts per channel into 8Ω (stereo) Frequency response: 18Hz to 30kHz Total harmonic distortion: 0.08% Damping factor: 53 Input sensitivity: 2.8mV (MM), 180mV (line) Signal to noise ratio: 72dB (MM), 80dB (line) Output: 500mV (line) My question is, will this receiver supply enough wattage as to not damage the speakers? Thanks in advance. Quote Link to comment Share on other sites More sharing options...
willland Posted February 16, 2018 Share Posted February 16, 2018 HalusN8er, Welcome to the forum. How large is your room? How loud will you be listening? Bill Quote Link to comment Share on other sites More sharing options...
HalusN8er Posted February 16, 2018 Author Share Posted February 16, 2018 It’s my living room, which is approximately 15’x20’, with a high ceiling. Not exactly sure how to answer how loud I will be listening, but I have never had the volume on that receiver turned to half way up. Moderate music listening levels, never what I would consider “cranked”, but loud enough at times that you would have to talk loudly to have a conversation. 1 Quote Link to comment Share on other sites More sharing options...
Ceptorman Posted February 16, 2018 Share Posted February 16, 2018 I think that receiver would do fine with those speakers....sit back and enjoy. 1 Quote Link to comment Share on other sites More sharing options...
JohnA Posted February 16, 2018 Share Posted February 16, 2018 So, here's how you calculate this stuff. 30 watts is 14.8 dBW (dB above a watt) https://www.crownaudio.com/en/tools/calculators The speakers are 97 dB at 1 watt at 1 meter. 97 + 14.8 = 111.8 dB, say 112 A second speaker adds twice the sound or +6 dB (playing a mono signal for the pedantic) = 118 dB (at 1 meter) Sound level decreases 6 db for each doubling of distance (outdoors for the pedantic) and 3 meters/10 feet (9.8425197 for the p.......) reduces the sound level by 9.5 dB. http://www.sengpielaudio.com/calculator-distance.htm So your peak capability is 118 - 9.5 = 108.5, say 108 dB WITHOUT clipping (nasty sounding distortion) and at the amp's rated output. I would expect a Marantz to produce a little more than rated power. A symphony *may* hit peaks of 110 dB in the audience and sounds to me like it averages about 80 dB. Live jazz would be a comfortable 75 to 80 db average and 100 db peaks. Rock concerts, ...... well, "blow a 50 amp fuse." All that being proof you have plenty of power for realistic music levels, but if you hear gritty or brittle sounds, turn down the volume quickly; that is the first sign of clipping. Further, 3 db, a barely noticeable change requires twice the amplifier power and a big change, 10 dB, requires 10x the amplifier power. You will have to make a big change in power to get much louder. 4 1 Quote Link to comment Share on other sites More sharing options...
HalusN8er Posted February 16, 2018 Author Share Posted February 16, 2018 3 hours ago, JohnA said: So, here's how you calculate this stuff. 30 watts is 14.8 dBW (dB above a watt) https://www.crownaudio.com/en/tools/calculators The speakers are 97 dB at 1 watt at 1 meter. 97 + 14.8 = 111.8 dB, say 112 A second speaker adds twice the sound or +6 dB (playing a mono signal for the pedantic) = 118 dB (at 1 meter) Sound level decreases 6 db for each doubling of distance (outdoors for the pedantic) and 3 meters/10 feet (9.8425197 for the p.......) reduces the sound level by 9.5 dB. http://www.sengpielaudio.com/calculator-distance.htm So your peak capability is 118 - 9.5 = 108.5, say 108 dB WITHOUT clipping (nasty sounding distortion) and at the amp's rated output. I would expect a Marantz to produce a little more than rated power. A symphony *may* hit peaks of 110 dB in the audience and sounds to me like it averages about 80 dB. Live jazz would be a comfortable 75 to 80 db average and 100 db peaks. Rock concerts, ...... well, "blow a 50 amp fuse." All that being proof you have plenty of power for realistic music levels, but if you hear gritty or brittle sounds, turn down the volume quickly; that is the first sign of clipping. Further, 3 db, a barely noticeable change requires twice the amplifier power and a big change, 10 dB, requires 10x the amplifier power. You will have to make a big change in power to get much louder. That was fantastic! Thank you for the clear explanation. Quote Link to comment Share on other sites More sharing options...
muel Posted February 17, 2018 Share Posted February 17, 2018 8 hours ago, HalusN8er said: That was fantastic! Thank you for the clear explanation. Yeah, he's good that way! 1 Quote Link to comment Share on other sites More sharing options...
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