Peerless HDS PPB 830860 + Vifa DX25TG-05-04
Copyright 2009 © Troels Gravesen
CROSS-
OVER
CABINET MEASURE-
MENTS
CROSS-
OVER
KIT

Download driver data files: 830860, DX25TG


Left: My pretty worn mini test cabs. These cabs have seen a lot of drivers over the years. Right: Crossover fine-tuning.

The excellent sandwich cones of previous HDS134 drivers (850488) are long time gone and it's time for making a substitute for this construction, thus the HDS-PPB version (838060) have been set up with either DX25TG or XT25TG tweeters.
Most small 5" drivers have relatively high Fs and I was curious to hear what this driver could make from ~8 liter cabinet volume and a port tuning of 55-60 Hz. Well, as if often the case we may be surprised from the bass performance of mini speakers and this PPB driver is no exception.
What came as an even better surprise was the quality of the midrange. Smooth, clean and very tolerable towards vocals. No nasty cone break-ups, thus I made cumulative spectral decay measurements as can be viewed below. This driver would do excellent too in a 3-way system.
For a low-cost mini, this speaker is highly recommended. The DX tweeter response may look a bit uneven, but nothing noticeable at all when it comes to sound. The XT provides smoother response - at higher cost, so take your pick. Some people love the XT, some don't. I think this has to do with the somewhat different dispersion characteristics of the XT.

The Crossover


LspCAD simulation and predicted response. Actually there were no changes to this during crossover fine-tuning.


Cabinet


Measurements


Left: Frequency response of driver in cabinet. Right: Impedance of drivers in cabinet.


Left: SPL 2.8V/1 meter. System sensitivity = 85 dB/2.8 volts.
Right: Impedance of final system, 5 ohms minimum.


Left: Tweeter attenuation: Red: R1011 = 3R3, blue = 4R7. Right: Reverse tweeter polarity.


Left: CSD, 20 dB. Right: CSD, 40 dB, DX-version.


XT25TG version


Measurements XT-version


Left: T
Right: SPL, 1 meter, 2.8 volts.
Right: Tweeter attenuation: R1011 = 1.0, 2.2, 3.3 ohms. Tune to personal taste.


Crossover Kit


Crossover kit available from Jantzen Audio: contact@jantzen-audio.com
Kit only available for both tweeter options (it will only cost you 2 EUR extra)