Fountek (Rhyme Acoustic) active speaker A-100
I purchased a pair active speaker. This is manufactured by Fountek under the brand Rhyme Acoustic. The model number is A-100. It uses a 4" full-range driver with vented box. The electronic is contained in the right channel enclosure. The amplifier is LM4766 chipamp. The overall build quality is good. I just paid RMB 399.00 during its sales period. What a good deal!
Chinese product link is https://item.taobao.com/item.htm?spm..._u=od0rlto94d1 The frequency response shown in this product page does not match with that given the user's instruction of my pair. The curve shown in user's instruction does pretty much match with my initial listening impression: lack of treble.
I measured the speaker with my CLIO Pocket. Measurement shows left and right enclosure response are matched very well.
The last figure shows the left box (passive) driven by another amplifier. We can then see what filtering or EQ is used in the A-100 amplifier. It can be seen compensation of baffle step and boost in HF.
[Update 28-7-2015]
When I use another amplifier (no filtering/EQ) to drive the passive side, the speaker sounds more balanced. I think modifying the electronic is a must.
Electronic board photos added.
Chinese product link is https://item.taobao.com/item.htm?spm..._u=od0rlto94d1 The frequency response shown in this product page does not match with that given the user's instruction of my pair. The curve shown in user's instruction does pretty much match with my initial listening impression: lack of treble.
I measured the speaker with my CLIO Pocket. Measurement shows left and right enclosure response are matched very well.
The last figure shows the left box (passive) driven by another amplifier. We can then see what filtering or EQ is used in the A-100 amplifier. It can be seen compensation of baffle step and boost in HF.
[Update 28-7-2015]
When I use another amplifier (no filtering/EQ) to drive the passive side, the speaker sounds more balanced. I think modifying the electronic is a must.
Electronic board photos added.
Total Comments 6
Comments
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Posted 24th July 2015 at 08:34 AM by panson_hk -
Posted 25th July 2015 at 02:56 AM by abraxalito -
Posted 27th July 2015 at 04:58 AM by panson_hk -
Posted 27th July 2015 at 11:13 PM by abraxalito -
Posted 28th July 2015 at 01:19 AM by panson_hk
Updated 28th July 2015 at 01:21 AM by panson_hk -
Posted 28th July 2015 at 02:58 PM by abraxalito