Speaker problems

[Ilja Scenikov]

Good day,

I have TEAC AR600 amplifier connected with YAMAHA NS515F speakers (to A) and DLS IC623 (to B). All working well, except DLS IC623 connected to B, they sound like MONO, like speakers with out tweeter. Can you help me please, can it be just wrong speakers to amplifier or better to search damage in speakers or amplifier?
Thank you.
Amplifier:

Yamaha speakers:
Type ............................. 3-way bass reflex speaker system
Magnetic shielding type
Driver ......................................... 16 cm (6.5”) cone woofer
16 cm (6.5”) cone mid-woofer
3 cm (1”) dome tweeter
Impedance ................................................................... 6 Ω
Frequency Response ................................ 40 Hz to 50 kHz
Nominal Input Power ................................................ 100 W
Maximum Input Power .............................................. 300 W
Sensitivity ................................................... 90 dB/2.83 V/m
Crossover Frequency ................................... 500 Hz, 3 kHz
Dimensions (WxHxD) ....................... 200 x 1000 x 328 mm
(7-7/8” x 39-3/8” x 12-15/16”)
Weight ................................................. 21 kg (46 lbs. 3 oz.)
(Including the stands)
Accessories ................................... Stand x 4 (L x 2, R x 2)
Screw (6mm) x 4
Wood screw (4mm) x 4
Pad x 4
DLS speakers:
Model Bass driver Tweeter Impedance Nom. Max Sensi- Magnet Installation Mounting hole Outer size
power power tivity size depth cut out size Dimension
IC 623 16,5 cm / 6,5” 20 mm 4 ohm 55 W 80 W 90 dB 80 mm / 3,15” 61 mm / 2,4” 205 mm / 8,07” 234 mm / 9,21”

 

[TLS Guy]

Good day,

I have TEAC AR600 amplifier connected with YAMAHA NS515F speakers (to A) and DLS IC623 (to B). All working well, except DLS IC623 connected to B, they sound like MONO, like speakers with out tweeter. Can you help me please, can it be just wrong speakers to amplifier or better to search damage in speakers or amplifier?
Thank you.
Amplifier:

Yamaha speakers:
Type ............................. 3-way bass reflex speaker system
Magnetic shielding type
Driver ......................................... 16 cm (6.5”) cone woofer
16 cm (6.5”) cone mid-woofer
3 cm (1”) dome tweeter
Impedance ................................................................... 6 Ω
Frequency Response ................................ 40 Hz to 50 kHz
Nominal Input Power ................................................ 100 W
Maximum Input Power .............................................. 300 W
Sensitivity ................................................... 90 dB/2.83 V/m
Crossover Frequency ................................... 500 Hz, 3 kHz
Dimensions (WxHxD) ....................... 200 x 1000 x 328 mm
(7-7/8” x 39-3/8” x 12-15/16”)
Weight ................................................. 21 kg (46 lbs. 3 oz.)
(Including the stands)
Accessories ................................... Stand x 4 (L x 2, R x 2)
Screw (6mm) x 4
Wood screw (4mm) x 4
Pad x 4
DLS speakers:
Model Bass driver Tweeter Impedance Nom. Max Sensi- Magnet Installation Mounting hole Outer size
power power tivity size depth cut out size Dimension
IC 623 16,5 cm / 6,5” 20 mm 4 ohm 55 W 80 W 90 dB 80 mm / 3,15” 61 mm / 2,4” 205 mm / 8,07” 234 mm / 9,21”

Sounds as if the tweeters are blown in the DLS speakers

 

[Ilja Scenikov]

Yes sounds like tweeters are not working well. Is it possible to blow this tweeters with such amplifier?

 

[TLS Guy]

Yes sounds like tweeters are not working well. Is it possible to blow this tweeters with such amplifier?

Yes.

 

[Pogre]

If they sound like speakers without tweeters I'd say there's a good chance your tweets are shot?

More info would help. Are you using all of the speakers at the same time or one zone at a time? I see the DLS' are 4 ohm ceiling speakers and that can cause some issues if you're playing both A & B at the same time (the Yamahas being 6 ohm speakers). Also it's been my experience that ceiling speakers don't often sound that great to begin with.

 

[Ilja Scenikov]

Thanks for reply. Time to send them for repair or better to by new ones.
Does A and B input for speakers on amplifier give different RMS power? Or it just divided?
Its writen 120 + 120 RMS, but you can connect 4 speakers.

 

[Ilja Scenikov]

If they sound like speakers without tweeters I'd say there's a good chance your tweets are shot?

More info would help. Are you using all of the speakers at the same time or one zone at a time? I see the DLS' are 4 ohm ceiling speakers and that can cause some issues if you're playing both A & B at the same time. Also it's been my experience that ceiling speakers don't often sound that great to begin with.

I am using together A+B, but even if you keep only B, sounds the same, i can say - very bad.

 

[TLS Guy]

I am using together A+B, but even if you keep only B, sounds the same, i can say - very bad.

the A/B switch is a simple switch and connect to the same amps. They should not be used together at the same time, only A or B at anyone time. I suspect clipping as a cause of your tweeter failure.

Can you get replacement tweeters for those speakers?

 

[Pogre]

Thanks for reply. Time to send them for repair or better to by new ones.
Does A and B input for speakers on amplifier give different RMS power? Or it just divided?
Its writen 120 + 120 RMS, but you can connect 4 speakers.

I believe it's 120 wpc into 4 ohms for 2 channels. Running both A &B would split that between the zones if I understand correctly. This is what I got from the owner's manual for that Teac,

Check the impedance of your speakers. Connect speaker
with an impedance of 4 to 16 ohms when using only one
pair of speakers (SPEAKERS A or SPEAKERS B). When using
two pairs of speakers simultaneously, the impedance should
be 8 to 16 ohms.

With the speakers you have connected it's recommended to only run one zone at a time. All 4 of those speakers need to be 8 ohm or greater for that amp to run stable with both zones selected.

 

[Pogre]

the A/B switch is a simple switch and connect to the same amps. They should not be used together at the same time, only A or B at anyone time. I suspect clipping as a cause of your tweeter failure.

Can you get replacement tweeters for those speakers?

Yup. I believe that's likely what happened. I posted some info from the manual above.

 

[Ilja Scenikov]

the A/B switch is a simple switch and connect to the same amps. They should not be used together at the same time, only A or B at anyone time. I suspect clipping as a cause of your tweeter failure.

Can you get replacement tweeters for those speakers?

I dont know yet, but i'll find out tomorrow.

 

[Ilja Scenikov]

Thanks for help!!! I think best solution is to change DLS with 8 ohm speakers.
Just noticed that Yamahas are 6 ohms, can they be damaged as well using A+B?

 

[lovinthehd]

Thanks for help!!! I think best solution is to change DLS with 8 ohm speakers.
Just noticed that Yamahas are 6 ohms, can they be damaged as well using A+B?

The best solution is not to use A plus B, it's not intended for that purpose particularly. Plus having dual stereo speakers in same room isn't all that good anyways, especially ceiling speakers...stick to one good pair of speakers would probably yield better results overall.