Actually was not even thinking of going down to a 3.5" the specs and claims and some of the builder opinions have me thinking about getting a couple and do a small box near-field speaker , and yes I read all available on this in the forum.
Nominal Diameter 3-1/2"
Power Handling (RMS) 20 Watts
Power Handling (max) 40 Watts
Impedance 8 ohms
Frequency Response 80 to 20,000 Hz
Sensitivity 81 dB 2.83V/1m
Voice Coil Diameter1"
THIELE-SMALL PARAMETERS
Resonant Frequency (Fs)86
Hz DC Resistance (Re)7.2 ohms
Voice Coil Inductance (Le)0.055
mH Mechanical Q (Qms)4.9
Electromagnetic Q (Qes)1.09
Total Q (Qts)0.89
Compliance Equivalent Volume (Vas)0.04 ft.³
Mechanical Compliance of Suspension (Cms)0.65 mm/N
BL Product (BL)4.33
Tm Diaphragm Mass Inc. Airload (Mms)5.25g
Maximum Linear Excursion (Xmax)3.5 mm
MATERIALS OF CONSTRUCTION
Cone Material Paper
Magnet Material Ferrite
Has an EBP of 78 sealed or ported
Sealed Volume 0.1 ft.³ Sealed F3 84 Hz
Vented Volume0.2 ft.³Vented F3 50 Hz
Is this for real or a gimmick type technology ? even in a sealed box of basically no size will give 87 hz .
I am a sucker for bold claims for example I used Acoustical Magic Borosilicate Paint in the 80s and 90s on the inside of all cabinets I built ...lol
and this is what hooked me , for real ? or BS ?
If anyone has used this unit please chime-in and let us know your impressions of it's performance
https://www.parts-express.com/tecto...-3-1-2-bmr-full-range-speaker-8-ohm--297-2156
Wonder if it is available or going to be available in 4" 4.5" or 5"
.
Nominal Diameter 3-1/2"
Power Handling (RMS) 20 Watts
Power Handling (max) 40 Watts
Impedance 8 ohms
Frequency Response 80 to 20,000 Hz
Sensitivity 81 dB 2.83V/1m
Voice Coil Diameter1"
THIELE-SMALL PARAMETERS
Resonant Frequency (Fs)86
Hz DC Resistance (Re)7.2 ohms
Voice Coil Inductance (Le)0.055
mH Mechanical Q (Qms)4.9
Electromagnetic Q (Qes)1.09
Total Q (Qts)0.89
Compliance Equivalent Volume (Vas)0.04 ft.³
Mechanical Compliance of Suspension (Cms)0.65 mm/N
BL Product (BL)4.33
Tm Diaphragm Mass Inc. Airload (Mms)5.25g
Maximum Linear Excursion (Xmax)3.5 mm
MATERIALS OF CONSTRUCTION
Cone Material Paper
Magnet Material Ferrite
Has an EBP of 78 sealed or ported
Sealed Volume 0.1 ft.³ Sealed F3 84 Hz
Vented Volume0.2 ft.³Vented F3 50 Hz
Is this for real or a gimmick type technology ? even in a sealed box of basically no size will give 87 hz .
I am a sucker for bold claims for example I used Acoustical Magic Borosilicate Paint in the 80s and 90s on the inside of all cabinets I built ...lol
and this is what hooked me , for real ? or BS ?
If anyone has used this unit please chime-in and let us know your impressions of it's performance
https://www.parts-express.com/tecto...-3-1-2-bmr-full-range-speaker-8-ohm--297-2156
Wonder if it is available or going to be available in 4" 4.5" or 5"
.
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No, BMRs are not a gimmick, but you generally get what you pay for. This is a cheap driver; response & distortion levels last I checked were not distinguished, while sensitivity is miserable, even for a 3 - 3 1/2in unit. As I mentioned in one of the other threads you started (why another one for this unit?), EBP means little / nothing. As in this case. No reasonable type of reflex alignment is available given the high Q; with sealed best you can manage is a slightly peaking Qtc = Qts. A damped TL tuned to F0 or slightly below would be an alternative. Overall, it offers no advantage I can think of compared to the Vifa TC9 at roughly the same price.
I put one in a .2 Sq. Ft. box with a 1" I.D. port 2" long and I think it sounds great! Might need a tweet but that's up to personal taste. Pretty much a near field unit..
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