Comparison JBL E40BT vs JBL Synchros E50BT

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	JBL E40BT	JBL Synchros E50BT
	from 6 499 ₴ Outdated Product	from 1 419 ₴ Outdated Product
all specs only differences
User reviews	₃ ₆ ₈ ₁₀	₄ ₄ ₁₂ ₁₆
		ShareMe function - the ability to send an audio stream to a compatible device
Connection and design
Design	overhead, closed foldable swiveling earcups	overhead, closed foldable swiveling earcups
Connection type	combined	combined
Connection	mini-Jack (3.5 mm) Bluetooth v 3.0	mini-Jack (3.5 mm) Bluetooth v 3.0
Plug	straight	straight
Cable supply	single-sided	single-sided
Range	10 m	10 m
Cable type	round	round
Detachable cable
Specs
Impedance	32 Ohm	32 Ohm
Frequency range	20 – 22000 Hz	20 – 22000 Hz
Speaker size	40 mm	50 mm
Emitter type	dynamic	dynamic
Microphone specs
Microphone	built into the case	built into the case
Sensitivity	-42 dB	-42 dB
Features
Volume control
Power supply
Power source	battery	battery
Headphone battery capacity	610 mAh	730 mAh
Operating time (music)	24 h	24 h
General
Weight	205 g	275 g
Color
Added to E-Catalog	september 2014	september 2014

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Brief conclusions of the comparison headphones

Headphones JBL E40BT and JBL Synchros E50BT have similar features, but there are key differences as well. The E40BT has dynamic drivers with a diameter of 40 mm and provides a frequency range from 20 to 22,000 Hz, while the E50BT has 50 mm drivers, which can deliver a deeper and richer sound. According to user reviews, the E50BT stands out with deeper bass and superior sound quality, although some users note issues with build quality. The E40BT also receives positive feedback for comfort and sound, but users mention a lack of bass. Both devices have wireless connectivity capability and a similar operating range; however, the E50BT offers slightly more battery life (18 hours of music compared to 16 hours with the E40BT).

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Speaker size

The diameter of the speaker installed in the headphones; models with multiple drivers (see "Number of drivers"), usually, the size of the largest speaker is taken into account, other dimensions can be specified in the notes.

In general, this parameter is relevant primarily for over-ear headphones (see "Design"). In them, emitters can have different sizes; the larger it is, the more saturated the sound is and the better the speaker reproduces the bass, however, large emitters have a corresponding effect on the dimensions, weight and price of the headphones. But in-ear "ears" and earbuds, by definition, have very small speakers, and rich bass in them is achieved due to other design features.

Headphone battery capacity

The capacity of the battery installed in the headphones of the corresponding design (see "Power").

Theoretically, a higher capacity allows to achieve greater battery life, but in fact, the operating time also depends on the power consumption of the headphones — and it can be very different, depending on the characteristics and design features. So this parameter is secondary, and when choosing it is worth paying attention not so much to the battery capacity, but to the directly claimed operating time (see below).

Weight

The total weight of the headphones; for true wireless models (see "Cable Type"), the weight of each individual earbud is listed.

This parameter is directly related to the design (see above) and some features of the functionality. Thus, the mentioned true wireless devices are very light, their weight does not exceed 25 g. More traditional in-ears and in-ears can be noticeably heavier, up to 50g for in-ears and up to 100g for most in-ears. Overhead models, for the most part, are quite massive: among them there are many models weighing 200 – 250 g, 250 – 300 g and even more than 300 g. It should be noted that a significant weight for false ears is often not a disadvantage, but an advantage: it allows them to stay on the head more securely, creates an impression of solidity and reliability, and most often does not create significant inconvenience.