Another Bargain driver to try

[GM]

Yeah, as exotic/beautiful as they are, they only sounded good to me in a small, over-damped room with mono Chet Atkins and similar recordings.

GM

 

[xrk971]

Just received two of the MCM 55-1856 4" drivers;
Specifications:
Power Capacity: 50W/100W RMS/peak
Sensitivity: 86dB (W/M)
Impedance: 8Ω
Re: 6.6Ω
Le: 0.48mH
Frequency response: 65Hz ~ 17KHz
Fs: 65Hz
Qts: 0.365
Qes: 0.436
Qms: 2.25
Vas: 3.15 (liters)
Xmax: 2.25mm
Overall frame diameter: 4.13" (pincushion)
Required cutout: 3.66"
Mounting depth: 2.5"

The 17 Oz magnet is almost as large as the speaker cone diameter, Tried it in a .5 cu inch ported, and short TL. Worked well in both with good bass and with some Eq it really
rocked. Best used with out a tweeter as there is a steady rise in the highs to about 10K with a fall off there after. At Ten bucks each they are indeed a bargain.

Here is a possible very compact MLTL one can make with this driver: 4 in wide x 3.5 in deep x 40 in long, 2 in dia x 3.75 in long vent located 4 in from bottom, driver 11.4 in from top. 3 ohm + 1.0 mH BSC if desired.