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Mini Box e+ - Page 3

post #31 of 89
Quote:
Originally Posted by goodluck4u View Post
Does anyone try to use other opeamps such like OPA627 instead of AD8610?

My first MiniBox-E+ that is producted at Dec. 2007 has been dead due to over-discharging. After it I have recieved the replacement that is producted at Jan. 2008.

I think two MiniBox-E+s are different on sound tendency. Whereas the Dec. version tends to be tight, the Jan. tends to be wide. Is this my illusion?
Can you elaborate on how the discharging issue arises? Thanks
post #32 of 89
I want to know as well.. mine came around 20/Dec/07, and I have no charging/discharging problem (except for the wrong AC adaptor issue), so far.
post #33 of 89
Soon after I received my original MiniBox I also found that sometimes it wouldn’t charge, the battery stayed flat and I had a dead amp. This seemed to be to do with the sequence that the charger was plugged into the back of the amp. Sometimes if you plugged the charger into the wall outlet and then plugged it into the MiniBox it looked as though there may have been a momentary short or discontinuity that the charger didn’t like, and it shut down giving no charge. But if you plug the charger into the amp first (make sure the red led lights on the charger) and then plug it into the wall outlet, this seems to give a reliable charge.
post #34 of 89
how was it paired with shure e4c coz currently im using port amp v2 and been thinking to upgrade to ibasso p2 or little dot mk1 or this?

any suggestion to boost my bass on shure e4c

will be greatly appreciated. my music is jazz, pop and new wave

thanks

-doughn
post #35 of 89
Quote:
Originally Posted by autosound View Post
Can you elaborate on how the discharging issue arises? Thanks
The following is my memories:
#1. The charge lamp behaves irregular. That of the replacement is no problem.
#2. Its problem occured when I drived the broken E+ on 8 hours because of burn-in.
#3. Whereas E+'s battery life is around 60 hours as usual, the broken E+'s battery life is less than 25 hours.

PS.
I guessed #1 is not a significant problem at the early time.
post #36 of 89
Quote:
Originally Posted by goodluck4u View Post
Does anyone try to use other opeamps such like OPA627 instead of AD8610?

My first MiniBox-E+ that is producted at Dec. 2007 has been dead due to over-discharging. After it I have recieved the replacement that is producted at Jan. 2008.

I think two MiniBox-E+s are different on sound tendency. Whereas the Dec. version tends to be tight, the Jan. tends to be wide. Is this my illusion?

It is very possible that the difference you heard was due to the battery situation. Remember that in ALL audio amplifiers - the power supply is a critical factor. So it is very possible that your weak/defective battery was the cause of the difference in the sound signatures.

Best,

angel
post #37 of 89
Quote:
Originally Posted by doppler_pulse View Post
Hmm, the same thing happened with my E+ that I purchased in november 2007; it died of over-discharging.

I noticed that the soundstage was more compressed with my older amp as opposed to the replacement I recently received . It also seems as if the overall signature is much more neutral as it doesn't add quite as much of its own 'flavour'. Then again, I still in the process of burning in (< 50 hours).
This is what I said to goodluck4u regarding this issue:

"It is very possible that the difference you heard was due to the battery situation. Remember that in ALL audio amplifiers - the power supply is a critical factor. So it is very possible that your weak/defective battery was the cause of the difference in the sound signatures."

Based on your comment that that your defective unit's soundfield was 'compressed', I pretty sure that what you guys notice was indeed the effect of a 'poor' power supply on the MiniBox E+.

Outside of of the particulars of this situation, it is a perfect example of HOW MUCH effect a power supply can have on audio equipments ability to operate properly, or not!

This is one of the damnations of Audio. An AC power supply give you 'strong' power but loads of line noise. On the other side, a DC power supply give you 'weak' power (unless you going to use FRESH batteries, every time), but you don't suffer the line noise. The movement to Lithium and Lion rechargeables helps to resolve this situation to a certain degree. Not 100%, but a significant improvement.

Best,

angel
post #38 of 89
Quote:
Originally Posted by Thermionic View Post
Soon after I received my original MiniBox I also found that sometimes it wouldn’t charge, the battery stayed flat and I had a dead amp. This seemed to be to do with the sequence that the charger was plugged into the back of the amp. Sometimes if you plugged the charger into the wall outlet and then plugged it into the MiniBox it looked as though there may have been a momentary short or discontinuity that the charger didn’t like, and it shut down giving no charge. But if you plug the charger into the amp first (make sure the red led lights on the charger) and then plug it into the wall outlet, this seems to give a reliable charge.
You discovered the problem, and made the perfect diagnosis. A lot of the electronic 'toys' being marketed these days can't take the 'line-shock'. Some 'toys' will fry if you plug into the wall first, so that the plug going into the 'toy' is hot. For the safety and longevity of your electronic 'toys' - connect the power supply to the 'toy' FIRST, and then connect to the wall socket (mains ;-).

Bset,

angel
post #39 of 89
So the power switch on mine broke after one week of use. All the switches look fragile to me after considering things. Anyone else agree?
post #40 of 89
Today I met with vorlon1 and we compared various amps: MiniBox-E, MiniBox-E+, Pico w/ DAC, The Predator, SR-71, and a modded iBasso D1. In this thread I will only discuss my opinion of the MiniBox-E+ vs the MiniBox-E. The rest of the amps will be adressed in a separate thread.

As you may know I love the MiniBox-E because of its soundstage, detail, separatio, and clarity. Well IMO the MiniBox-E+ better the clarity, depth, and detail. This is a great amp that at $179 is a major bargain. I forgot to mention that it has great bass and impact.

If you get it you should be very happy.
post #41 of 89
thanks mrarroyo. Your reviews and comments pushed me to get one. It's still burning in, but still sounds great.
post #42 of 89
I don't think the OPA627s would work well in this amp. Unless you have a high voltage battery or some serious class A biasing at least. The OPA 627s are very high current and require lots of voltage to run properly. They're kinda like the HD650's of op amps.
post #43 of 89
Also how does this compare directly to the Tomohawk?
post #44 of 89
Quote:
Originally Posted by Joelc87 View Post
I don't think the OPA627s would work well in this amp. Unless you have a high voltage battery or some serious class A biasing at least. The OPA 627s are very high current and require lots of voltage to run properly. They're kinda like the HD650's of op amps.
The new battery in the Minibox-E+ provides is 18v Li-ion battery. According to the specifications of the 627 it should work +/-4.5 V to +/-18 V

I hope one of the DIYers jumps in and helps clarify the situation. I can tell you that I have a pair of 797 ready to roll.
post #45 of 89
Quote:
Originally Posted by mrarroyo View Post
Today I met with vorlon1 and we compared various amps: MiniBox-E, MiniBox-E+, Pico w/ DAC, The Predator, SR-71, and a modded iBasso D1. In this thread I will only discuss my opinion of the MiniBox-E+ vs the MiniBox-E. The rest of the amps will be adressed in a separate thread.

As you may know I love the MiniBox-E because of its soundstage, detail, separatio, and clarity. Well IMO the MiniBox-E+ better the clarity, depth, and detail. This is a great amp that at $179 is a major bargain. I forgot to mention that it has great bass and impact.

If you get it you should be very happy.

Hi mrarroyo,

Three quickies:

(1) Did you establish a separate thread re the other amps, esp. the iBasso D1, or is it the stuff added at the end of the "33" manifesto???

(2) Have you had the time to do any op-rolling on your MiniBox-E+???

(3) On his list Skylab ranked the Go-Vibe 7 (which I own) above the MiniBox-E+ (which I been interested in for a while); You, I believe, feel that the MiniBox-E+ is significantly better than the Go-Vibe 7. So I'm wondering, am I going to be happy/unhappy with the MiniBox-E+??? Your opinion would be helpful; a bite more detail on the E+ vs. the 7 would help. Danka.

Note: BTW you maybe interested in the fact that there is a MiniBox-F available in Asia. I've got to drop Fang a note to see if they have plans to import it.

Best,

angel
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