Wanting to throw a couple parties, I researched information for some weeks in the audio department. Looking at websites that sell PA System packages, I saw Technical Pro amps coming up a lot towards the cheap end. So I dropped some moneys on the entry level model.
Their Hybrid series of amps are a combination of a power amplifier, pre-amplifier, and tuner. So you can use it to power pretty much any type of speaker and prepare audio signals to be sent to other amplifiers; meaning this amp is pretty versatile and expandable. It looks pretty nice and has a lot of connections, even though it's one of those 'cheap-chinese-factory' made amps.
SpecificationsWhen you look at this, it seems more like a receiver than a power amplifier, and like most receivers it has A/B channels. I assume using A+B mode runs the channels in parallel like other receivers. I only have 2 speakers connected at a time so I only use the A channel.
Unfortunately, Technical Pro doesn't list all the specs on their site, so I've put together information based on the specs from websites selling the amplifier. It would be nice if Technical Pro listed more useful information other than a theoretical amount of watts.
Note: A '?' is a guess value.
| HB1502U |
4 Channels 8ohms 4ohms 2ohms | 70 watts per channel ? 100 watts per channel ? Unknown |
Surround Output 8ohms 4ohms 2ohms | Unknown Unknown Unknown |
Total Harmonic Distortion (THD) 20Hz - 20kHz | 8ohms: Not sure // 4ohms: Not sure // 2ohms: Not sure |
Signal to Noise Ratio (20Hz - 20kHz) | Not sure |
Amplifier Class | Class AB ? |
Subwoofer Out Low pass filter crossover frequency | Unknown |
The LooksThere's 3 models: HB1502U, HB2502U, and HB3502U. All models are made for rack mounts and take up 2 units of space (hence the '2U' in the model names). I think the looks are similar to Maverick Audio's DAC and hybrid tube amp. The front of the Technical Pro amplifier has a brush aluminum face and sexy looking knobs. The case is dark-smoke aluminum with vents on the top. Also the front has handles on the rack mount ears.
Personally, I think the screen is pretty darn sexy. When powered off, it's a perfect mirror. When powered on, there's a nice double reflection and the electro-luminescent display has a ghosting effect that looks pretty nice. You can also see the circuitry connecting different screen elements together which I think is cool looking. One thing I find sort of funny are the fake icons on the screen, it reminds me of 90s electronics sort of. There's a 'TURBO POWER' graphic in the corner. Next to it is a fake wireless reception icon, ESP icon, Karaoke icon, cassette tape icon, and a digital CD icon. It's really 90s and I like it.
The screen icons that are not fake include the audio input source, speaker output (A, B, A+B), radio band selection, Bass and Treble controls, Balance control, a display that looks similar to a clock or calculator LCD, and a dancing EQ meter.
Honestly, I think the case is the most expensive part of the amp. The looks are better than the performance you expect out of this thing
The PowerWill finish later.
The ConnectionsWill finish later.
Final ThoughtsWill finish later.
How I Have My SetupLaterrrrrrr.
Included ManualThe manual is sort of cheap as it only has information on how to use the amp. It doesn't have any extra specifications like RMS, THD, amplifier class, etc. However it does have a circuitry page.
Here are links to each page of the manual (taken with a camera):
Things Technical Pro Should DoEven thought the company caters to a low to mid range level consumer, there's no reason a company shouldn't strive for high standards. High standards includes being honest about their products and including all the information they can. This product is basically from an electronics sweatshop, but that doesn't mean the company shouldn't care about what they're selling. This is why I think they should do the following:
- Put their manuals online in PDF format
- List all specifications for their amplifiers (e.g., RMS/Max average watts per channel at 1kHz, THD at 2ohms 4ohms 8ohms from 20Hz - 20kHz, Signal to noise ratio, amplifier class, dampening factor for 8ohms, frequency response range, what frequency the subwoofer out low pass filter is set to, etc)
PicturesI recently got some large "bookshelves" as I like to call them. White van speakers with 12" woofer, 3.5" mid, and 2.5" high. They're decent.
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